165820676155131 has 32 divisors (see below), whose sum is σ = 231089306011200. Its totient is φ = 105664971776000.

The previous prime is 165820676155103. The next prime is 165820676155157. The reversal of 165820676155131 is 131551676028561.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 165820676155131 - 2³⁹ = 165270920341243 is a prime.

It is a super-2 number, since 2×165820676155131² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (165820676155171) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13573206 + ... + 22712843.

It is an arithmetic number, because the mean of its divisors is an integer number (7221540812850).

Almost surely, 2^{165820676155131} is an apocalyptic number.

165820676155131 is a deficient number, since it is larger than the sum of its proper divisors (65268629856069).

165820676155131 is a wasteful number, since it uses less digits than its factorization.

165820676155131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36286847.

The product of its (nonzero) digits is 9072000, while the sum is 57.

The spelling of 165820676155131 in words is "one hundred sixty-five trillion, eight hundred twenty billion, six hundred seventy-six million, one hundred fifty-five thousand, one hundred thirty-one".