15645952940 has 48 divisors (see below), whose sum is σ = 33026085120. Its totient is φ = 6226165440.

The previous prime is 15645952919. The next prime is 15645952943. The reversal of 15645952940 is 4925954651.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (15645952943) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3460001 + ... + 3464519.

It is an arithmetic number, because the mean of its divisors is an integer number (688043440).

Almost surely, 2^15645952940 is an apocalyptic number.

15645952940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15645952940 is an abundant number, since it is smaller than the sum of its proper divisors (17380132180).

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

15645952940 is a wasteful number, since it uses less digits than its factorization.

15645952940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5382 (or 5380 counting only the distinct ones).

The product of its (nonzero) digits is 1944000, while the sum is 50.

The spelling of 15645952940 in words is "fifteen billion, six hundred forty-five million, nine hundred fifty-two thousand, nine hundred forty".