156457719640 has 32 divisors (see below), whose sum is σ = 352194792480. Its totient is φ = 62553768192.

The previous prime is 156457719611. The next prime is 156457719643. The reversal of 156457719640 is 46917754651.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156457719643) 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, 829692 + ... + 1000651.

It is an arithmetic number, because the mean of its divisors is an integer number (11006087265).

Almost surely, 2^156457719640 is an apocalyptic number.

156457719640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

156457719640 is an abundant number, since it is smaller than the sum of its proper divisors (195737072840).

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

156457719640 is a wasteful number, since it uses less digits than its factorization.

156457719640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1832491 (or 1832487 counting only the distinct ones).

The product of its (nonzero) digits is 6350400, while the sum is 55.

The spelling of 156457719640 in words is "one hundred fifty-six billion, four hundred fifty-seven million, seven hundred nineteen thousand, six hundred forty".