15162912640 has 64 divisors (see below), whose sum is σ = 36489129120. Its totient is φ = 6024960000.

The previous prime is 15162912631. The next prime is 15162912647. The reversal of 15162912640 is 4621926151.

It is a tau number, because it is divible by the number of its divisors (64).

It is a self number, because there is not a number n which added to its sum of digits gives 15162912640.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15162912647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18190 + ... + 175090.

Almost surely, 2^15162912640 is an apocalyptic number.

15162912640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15162912640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18244564560).

15162912640 is an abundant number, since it is smaller than the sum of its proper divisors (21326216480).

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

15162912640 is a wasteful number, since it uses less digits than its factorization.

15162912640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157071 (or 157059 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 37.

The spelling of 15162912640 in words is "fifteen billion, one hundred sixty-two million, nine hundred twelve thousand, six hundred forty".