161169570040960 has 64 divisors (see below), whose sum is σ = 414934157506680. Its totient is φ = 59508764319744.

The previous prime is 161169570040957. The next prime is 161169570040981. The reversal of 161169570040960 is 69040075961161.

It can be written as a sum of positive squares in 4 ways, for example, as 85868689439296 + 75300880601664 = 9266536^2 + 8677608^2 .

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×161169570040960² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9685662957 + ... + 9685679596.

Almost surely, 2^{161169570040960} is an apocalyptic number.

161169570040960 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161169570040960 is an abundant number, since it is smaller than the sum of its proper divisors (253764587465720).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161169570040960 is a wasteful number, since it uses less digits than its factorization.

161169570040960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19371342585 (or 19371342573 counting only the distinct ones).

The product of its (nonzero) digits is 2449440, while the sum is 55.

The spelling of 161169570040960 in words is "one hundred sixty-one trillion, one hundred sixty-nine billion, five hundred seventy million, forty thousand, nine hundred sixty".