156431987712 has 1056 divisors, whose sum is σ = 627178266624. Its totient is φ = 36229939200.

The previous prime is 156431987629. The next prime is 156431987713. The reversal of 156431987712 is 217789134651.

156431987712 is a `hidden beast` number, since 1 + 56 + 431 + 98 + 7 + 71 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (1056).

It is a super-3 number, since 3×156431987712³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156431987713) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 285981423 + ... + 285981969.

Almost surely, 2^156431987712 is an apocalyptic number.

156431987712 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 156431987712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (313589133312).

156431987712 is an abundant number, since it is smaller than the sum of its proper divisors (470746278912).

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

156431987712 is a wasteful number, since it uses less digits than its factorization.

156431987712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 635 (or 614 counting only the distinct ones).

The product of its digits is 2540160, while the sum is 54.

The spelling of 156431987712 in words is "one hundred fifty-six billion, four hundred thirty-one million, nine hundred eighty-seven thousand, seven hundred twelve".