161132934978 has 24 divisors (see below), whose sum is σ = 349133202288. Its totient is φ = 53709156312.

The previous prime is 161132934971. The next prime is 161132934983. The reversal of 161132934978 is 879439231161.

161132934978 is a `hidden beast` number, since 1 + 61 + 1 + 3 + 2 + 93 + 497 + 8 = 666.

161132934978 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (161132934971) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 460201 + ... + 730787.

It is an arithmetic number, because the mean of its divisors is an integer number (14547216762).

Almost surely, 2^161132934978 is an apocalyptic number.

161132934978 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

161132934978 is an abundant number, since it is smaller than the sum of its proper divisors (188000267310).

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

161132934978 is a wasteful number, since it uses less digits than its factorization.

161132934978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303678 (or 303675 counting only the distinct ones).

The product of its digits is 1959552, while the sum is 54.

The spelling of 161132934978 in words is "one hundred sixty-one billion, one hundred thirty-two million, nine hundred thirty-four thousand, nine hundred seventy-eight".