961761620 has 12 divisors (see below), whose sum is σ = 2019699444. Its totient is φ = 384704640.

The previous prime is 961761601. The next prime is 961761623. The reversal of 961761620 is 26167169.

It can be written as a sum of positive squares in 2 ways, for example, as 131515024 + 830246596 = 11468^2 + 28814^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (961761623) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24044021 + ... + 24044060.

It is an arithmetic number, because the mean of its divisors is an integer number (168308287).

Almost surely, 2^961761620 is an apocalyptic number.

It is an amenable number.

961761620 is an abundant number, since it is smaller than the sum of its proper divisors (1057937824).

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

961761620 is a wasteful number, since it uses less digits than its factorization.

961761620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48088090 (or 48088088 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 961761620 is about 31012.2817606186. The cubic root of 961761620 is about 987.0878677581.

The spelling of 961761620 in words is "nine hundred sixty-one million, seven hundred sixty-one thousand, six hundred twenty".