161385631508208 has 40 divisors (see below), whose sum is σ = 430361684025856. Its totient is φ = 52059881131200.

The previous prime is 161385631508077. The next prime is 161385631508219. The reversal of 161385631508208 is 802805136583161.

161385631508208 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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, 54229041358 + ... + 54229044333.

Almost surely, 2^{161385631508208} is an apocalyptic number.

It is an amenable number.

161385631508208 is an abundant number, since it is smaller than the sum of its proper divisors (268976052517648).

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

161385631508208 is a wasteful number, since it uses less digits than its factorization.

161385631508208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108458085733 (or 108458085727 counting only the distinct ones).

The product of its (nonzero) digits is 8294400, while the sum is 57.

The spelling of 161385631508208 in words is "one hundred sixty-one trillion, three hundred eighty-five billion, six hundred thirty-one million, five hundred eight thousand, two hundred eight".