1656179877261 has 64 divisors (see below), whose sum is σ = 2806550921216. Its totient is φ = 845094124800.

The previous prime is 1656179877229. The next prime is 1656179877301. The reversal of 1656179877261 is 1627789716561.

It is not a de Polignac number, because 1656179877261 - 2⁵ = 1656179877229 is a prime.

It is a super-2 number, since 2×1656179877261² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1656179877192 and 1656179877201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1656179877061) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 23585175 + ... + 23655291.

It is an arithmetic number, because the mean of its divisors is an integer number (43852358144).

Almost surely, 2^{1656179877261} is an apocalyptic number.

It is an amenable number.

1656179877261 is a deficient number, since it is larger than the sum of its proper divisors (1150371043955).

1656179877261 is a wasteful number, since it uses less digits than its factorization.

1656179877261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72962.

The product of its digits is 53343360, while the sum is 66.

The spelling of 1656179877261 in words is "one trillion, six hundred fifty-six billion, one hundred seventy-nine million, eight hundred seventy-seven thousand, two hundred sixty-one".