15871140432 has 640 divisors, whose sum is σ = 59516190720. Its totient is φ = 3941498880.

The previous prime is 15871140421. The next prime is 15871140451. The reversal of 15871140432 is 23404117851.

15871140432 is a `hidden beast` number, since 1 + 5 + 87 + 1 + 140 + 432 = 666.

It is a super-2 number, since 2×15871140432² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 36653688 + ... + 36654120.

It is an arithmetic number, because the mean of its divisors is an integer number (92994048).

Almost surely, 2^15871140432 is an apocalyptic number.

15871140432 is a gapful number since it is divisible by the number (12) 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 15871140432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29758095360).

15871140432 is an abundant number, since it is smaller than the sum of its proper divisors (43645050288).

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

15871140432 is a wasteful number, since it uses less digits than its factorization.

15871140432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 528 (or 516 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The spelling of 15871140432 in words is "fifteen billion, eight hundred seventy-one million, one hundred forty thousand, four hundred thirty-two".