162561656031 has 4 divisors (see below), whose sum is σ = 216748874712. Its totient is φ = 108374437352.

The previous prime is 162561656009. The next prime is 162561656057. The reversal of 162561656031 is 130656165261.

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

It is a cyclic number.

It is not a de Polignac number, because 162561656031 - 2⁷ = 162561655903 is a prime.

It is a super-3 number, since 3×162561656031³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (162561656071) 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, 27093609336 + ... + 27093609341.

It is an arithmetic number, because the mean of its divisors is an integer number (54187218678).

Almost surely, 2^162561656031 is an apocalyptic number.

162561656031 is a deficient number, since it is larger than the sum of its proper divisors (54187218681).

162561656031 is an equidigital number, since it uses as much as digits as its factorization.

162561656031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54187218680.

The product of its (nonzero) digits is 194400, while the sum is 42.

The spelling of 162561656031 in words is "one hundred sixty-two billion, five hundred sixty-one million, six hundred fifty-six thousand, thirty-one".