156640454625674 has 4 divisors (see below), whose sum is σ = 234960681938514. Its totient is φ = 78320227312836.

The previous prime is 156640454625659. The next prime is 156640454625691. The reversal of 156640454625674 is 476526454046651.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 131102339700049 + 25538114925625 = 11449993^2 + 5053525^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 156640454625674.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39160113656417 + ... + 39160113656420.

Almost surely, 2^{156640454625674} is an apocalyptic number.

156640454625674 is a deficient number, since it is larger than the sum of its proper divisors (78320227312840).

156640454625674 is an equidigital number, since it uses as much as digits as its factorization.

156640454625674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78320227312839.

The product of its (nonzero) digits is 580608000, while the sum is 65.

The spelling of 156640454625674 in words is "one hundred fifty-six trillion, six hundred forty billion, four hundred fifty-four million, six hundred twenty-five thousand, six hundred seventy-four".