32156156465 has 4 divisors (see below), whose sum is σ = 38587387764. Its totient is φ = 25724925168.

The previous prime is 32156156447. The next prime is 32156156467. The reversal of 32156156465 is 56465165123.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56465165123 = 59 ⋅957036697.

It can be written as a sum of positive squares in 2 ways, for example, as 11639604769 + 20516551696 = 107887^2 + 143236^2 .

It is a cyclic number.

It is not a de Polignac number, because 32156156465 - 2⁸ = 32156156209 is a prime.

It is a super-2 number, since 2×32156156465² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (32156156467) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3215615642 + ... + 3215615651.

It is an arithmetic number, because the mean of its divisors is an integer number (9646846941).

Almost surely, 2^32156156465 is an apocalyptic number.

It is an amenable number.

32156156465 is a deficient number, since it is larger than the sum of its proper divisors (6431231299).

32156156465 is an equidigital number, since it uses as much as digits as its factorization.

32156156465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6431231298.

The product of its digits is 648000, while the sum is 44.

The spelling of 32156156465 in words is "thirty-two billion, one hundred fifty-six million, one hundred fifty-six thousand, four hundred sixty-five".