165454728931 has 2 divisors, whose sum is σ = 165454728932. Its totient is φ = 165454728930.

The previous prime is 165454728919. The next prime is 165454728977. The reversal of 165454728931 is 139827454561.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 165454728931 - 2¹⁷ = 165454597859 is a prime.

It is a super-2 number, since 2×165454728931² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (165454728031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82727364465 + 82727364466.

It is an arithmetic number, because the mean of its divisors is an integer number (82727364466).

Almost surely, 2^165454728931 is an apocalyptic number.

165454728931 is a deficient number, since it is larger than the sum of its proper divisors (1).

165454728931 is an equidigital number, since it uses as much as digits as its factorization.

165454728931 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7257600, while the sum is 55.

The spelling of 165454728931 in words is "one hundred sixty-five billion, four hundred fifty-four million, seven hundred twenty-eight thousand, nine hundred thirty-one".