156606161601551 has 16 divisors (see below), whose sum is σ = 164061494937600. Its totient is φ = 149287939164000.

The previous prime is 156606161601523. The next prime is 156606161601553. The reversal of 156606161601551 is 155106161606651.

156606161601551 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-156606161601551 is a prime.

It is a super-2 number, since 2×156606161601551² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 156606161601551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156606161601553) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86184026 + ... + 87982376.

It is an arithmetic number, because the mean of its divisors is an integer number (10253843433600).

Almost surely, 2^{156606161601551} is an apocalyptic number.

156606161601551 is a deficient number, since it is larger than the sum of its proper divisors (7455333336049).

156606161601551 is a wasteful number, since it uses less digits than its factorization.

156606161601551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1836470.

The product of its (nonzero) digits is 972000, while the sum is 50.

The spelling of 156606161601551 in words is "one hundred fifty-six trillion, six hundred six billion, one hundred sixty-one million, six hundred one thousand, five hundred fifty-one".