156512791040 has 80 divisors (see below), whose sum is σ = 375663498408. Its totient is φ = 62538448896.

The previous prime is 156512791013. The next prime is 156512791049. The reversal of 156512791040 is 40197215651.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 152524615936 + 3988175104 = 390544^2 + 63152^2 .

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (156512791049) 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, 2407604 + ... + 2471756.

Almost surely, 2^156512791040 is an apocalyptic number.

156512791040 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 156512791040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (187831749204).

156512791040 is an abundant number, since it is smaller than the sum of its proper divisors (219150707368).

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

156512791040 is an frugal number, since it uses more digits than its factorization.

156512791040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65129 (or 65113 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 41.

The spelling of 156512791040 in words is "one hundred fifty-six billion, five hundred twelve million, seven hundred ninety-one thousand, forty".