169139505942 has 64 divisors (see below), whose sum is σ = 412985260800. Its totient is φ = 50885634240.

The previous prime is 169139505929. The next prime is 169139505961. The reversal of 169139505942 is 249505931961.

169139505942 is a `hidden beast` number, since 1 + 6 + 91 + 3 + 9 + 505 + 9 + 42 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 941703 + ... + 1106834.

It is an arithmetic number, because the mean of its divisors is an integer number (6452894700).

Almost surely, 2^169139505942 is an apocalyptic number.

169139505942 is an abundant number, since it is smaller than the sum of its proper divisors (243845754858).

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

169139505942 is a wasteful number, since it uses less digits than its factorization.

169139505942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2048698 (or 2048692 counting only the distinct ones).

The product of its (nonzero) digits is 2624400, while the sum is 54.

The spelling of 169139505942 in words is "one hundred sixty-nine billion, one hundred thirty-nine million, five hundred five thousand, nine hundred forty-two".