156406722655 has 4 divisors (see below), whose sum is σ = 187688067192. Its totient is φ = 125125378120.

The previous prime is 156406722643. The next prime is 156406722673. The reversal of 156406722655 is 556227604651.

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

It is not a de Polignac number, because 156406722655 - 2¹⁹ = 156406198367 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 156406722599 and 156406722608.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15640672261 + ... + 15640672270.

It is an arithmetic number, because the mean of its divisors is an integer number (46922016798).

Almost surely, 2^156406722655 is an apocalyptic number.

156406722655 is a deficient number, since it is larger than the sum of its proper divisors (31281344537).

156406722655 is an equidigital number, since it uses as much as digits as its factorization.

156406722655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31281344536.

The product of its (nonzero) digits is 3024000, while the sum is 49.

The spelling of 156406722655 in words is "one hundred fifty-six billion, four hundred six million, seven hundred twenty-two thousand, six hundred fifty-five".