161235534204 has 48 divisors (see below), whose sum is σ = 423744347040. Its totient is φ = 53008940160.

The previous prime is 161235534169. The next prime is 161235534211. The reversal of 161235534204 is 402435532161.

161235534204 is a `hidden beast` number, since 1 + 61 + 2 + 3 + 553 + 42 + 0 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10217607 + ... + 10233374.

It is an arithmetic number, because the mean of its divisors is an integer number (8828007230).

Almost surely, 2^161235534204 is an apocalyptic number.

It is an amenable number.

161235534204 is an abundant number, since it is smaller than the sum of its proper divisors (262508812836).

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

161235534204 is a wasteful number, since it uses less digits than its factorization.

161235534204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20451067 (or 20451059 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

The spelling of 161235534204 in words is "one hundred sixty-one billion, two hundred thirty-five million, five hundred thirty-four thousand, two hundred four".