1061641440 has 72 divisors (see below), whose sum is σ = 3622856328. Its totient is φ = 283104000.

The previous prime is 1061641411. The next prime is 1061641489. The reversal of 1061641440 is 441461601.

1061641440 is a `hidden beast` number, since 1 + 0 + 616 + 4 + 1 + 4 + 40 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a super-2 number, since 2×1061641440² = 2254165094250547200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 367186 + ... + 370065.

It is an arithmetic number, because the mean of its divisors is an integer number (50317449).

Almost surely, 2^1061641440 is an apocalyptic number.

1061641440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1061641440 is an abundant number, since it is smaller than the sum of its proper divisors (2561214888).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1061641440 is a wasteful number, since it uses less digits than its factorization.

1061641440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 737272 (or 737261 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 1061641440 is about 32582.8396552541. The cubic root of 1061641440 is about 1020.1388507632.

The spelling of 1061641440 in words is "one billion, sixty-one million, six hundred forty-one thousand, four hundred forty".