1061557550 has 48 divisors (see below), whose sum is σ = 2103615360. Its totient is φ = 397398240.

The previous prime is 1061557543. The next prime is 1061557561. The reversal of 1061557550 is 557551601.

It is a super-2 number, since 2×1061557550² = 2253808863924005000, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1061557550.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 72119 + ... + 85581.

It is an arithmetic number, because the mean of its divisors is an integer number (43825320).

Almost surely, 2^1061557550 is an apocalyptic number.

1061557550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1061557550 is a deficient number, since it is larger than the sum of its proper divisors (1042057810).

1061557550 is a wasteful number, since it uses less digits than its factorization.

1061557550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13577 (or 13572 counting only the distinct ones).

The product of its (nonzero) digits is 26250, while the sum is 35.

The square root of 1061557550 is about 32581.5522957394. The cubic root of 1061557550 is about 1020.1119798884. Note that the first 3 decimals are identical.

The spelling of 1061557550 in words is "one billion, sixty-one million, five hundred fifty-seven thousand, five hundred fifty".