15715464540 has 48 divisors (see below), whose sum is σ = 44324515872. Its totient is φ = 4160198656.

The previous prime is 15715464493. The next prime is 15715464553. The reversal of 15715464540 is 4546451751.

It is a junction number, because it is equal to n+sod(n) for n = 15715464492 and 15715464501.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 947709 + ... + 964148.

It is an arithmetic number, because the mean of its divisors is an integer number (923427414).

Almost surely, 2^15715464540 is an apocalyptic number.

15715464540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15715464540 is an abundant number, since it is smaller than the sum of its proper divisors (28609051332).

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

15715464540 is a wasteful number, since it uses less digits than its factorization.

15715464540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1912006 (or 1912004 counting only the distinct ones).

The product of its (nonzero) digits is 336000, while the sum is 42.

The spelling of 15715464540 in words is "fifteen billion, seven hundred fifteen million, four hundred sixty-four thousand, five hundred forty".