156264066505 has 4 divisors (see below), whose sum is σ = 187516879812. Its totient is φ = 125011253200.

The previous prime is 156264066493. The next prime is 156264066533. The reversal of 156264066505 is 505660462651.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 505660462651 = 89123 ⋅5673737.

It can be written as a sum of positive squares in 2 ways, for example, as 52097149504 + 104166917001 = 228248^2 + 322749^2 .

It is not a de Polignac number, because 156264066505 - 2⁵ = 156264066473 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15626406646 + ... + 15626406655.

It is an arithmetic number, because the mean of its divisors is an integer number (46879219953).

Almost surely, 2^156264066505 is an apocalyptic number.

It is an amenable number.

156264066505 is a deficient number, since it is larger than the sum of its proper divisors (31252813307).

156264066505 is an equidigital number, since it uses as much as digits as its factorization.

156264066505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31252813306.

The product of its (nonzero) digits is 1296000, while the sum is 46.

The spelling of 156264066505 in words is "one hundred fifty-six billion, two hundred sixty-four million, sixty-six thousand, five hundred five".