956521640 has 16 divisors (see below), whose sum is σ = 2152173780. Its totient is φ = 382608640.

The previous prime is 956521639. The next prime is 956521661. The reversal of 956521640 is 46125659.

It can be written as a sum of positive squares in 2 ways, for example, as 900840196 + 55681444 = 30014^2 + 7462^2 .

It is a junction number, because it is equal to n+sod(n) for n = 956521594 and 956521603.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11956481 + ... + 11956560.

Almost surely, 2^956521640 is an apocalyptic number.

It is an amenable number.

956521640 is an abundant number, since it is smaller than the sum of its proper divisors (1195652140).

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

956521640 is a wasteful number, since it uses less digits than its factorization.

956521640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23913052 (or 23913048 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 38.

The square root of 956521640 is about 30927.6840387379. The cubic root of 956521640 is about 985.2919470952.

The spelling of 956521640 in words is "nine hundred fifty-six million, five hundred twenty-one thousand, six hundred forty".