161365267635 has 128 divisors (see below), whose sum is σ = 311464258560. Its totient is φ = 70289203200.

The previous prime is 161365267627. The next prime is 161365267643. The reversal of 161365267635 is 536762563161.

It is an interprime number because it is at equal distance from previous prime (161365267627) and next prime (161365267643).

It is not a de Polignac number, because 161365267635 - 2³ = 161365267627 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 41068351 + ... + 41072279.

It is an arithmetic number, because the mean of its divisors is an integer number (2433314520).

Almost surely, 2^161365267635 is an apocalyptic number.

161365267635 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

161365267635 is a deficient number, since it is larger than the sum of its proper divisors (150098990925).

161365267635 is a wasteful number, since it uses less digits than its factorization.

161365267635 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4469.

The product of its digits is 4082400, while the sum is 51.

It can be divided in two parts, 16136526 and 7635, that added together give a palindrome (16144161).

The spelling of 161365267635 in words is "one hundred sixty-one billion, three hundred sixty-five million, two hundred sixty-seven thousand, six hundred thirty-five".