15963948540 has 36 divisors (see below), whose sum is σ = 48423977784. Its totient is φ = 4257052896.

The previous prime is 15963948527. The next prime is 15963948547. The reversal of 15963948540 is 4584936951.

15963948540 is a `hidden beast` number, since 1 + 5 + 9 + 6 + 3 + 94 + 8 + 540 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15963948547) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44344122 + ... + 44344481.

It is an arithmetic number, because the mean of its divisors is an integer number (1345110494).

Almost surely, 2^15963948540 is an apocalyptic number.

15963948540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15963948540 is an abundant number, since it is smaller than the sum of its proper divisors (32460029244).

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

15963948540 is a wasteful number, since it uses less digits than its factorization.

15963948540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88688618 (or 88688613 counting only the distinct ones).

The product of its (nonzero) digits is 4665600, while the sum is 54.

The spelling of 15963948540 in words is "fifteen billion, nine hundred sixty-three million, nine hundred forty-eight thousand, five hundred forty".