161910865902 has 16 divisors (see below), whose sum is σ = 323863949952. Its totient is φ = 53963252280.

The previous prime is 161910865871. The next prime is 161910865933. The reversal of 161910865902 is 209568019161.

161910865902 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (161910865871) and next prime (161910865933).

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, 1709124 + ... + 1801367.

It is an arithmetic number, because the mean of its divisors is an integer number (20241496872).

Almost surely, 2^161910865902 is an apocalyptic number.

161910865902 is an abundant number, since it is smaller than the sum of its proper divisors (161953084050).

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

161910865902 is a wasteful number, since it uses less digits than its factorization.

161910865902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3518183.

The product of its (nonzero) digits is 233280, while the sum is 48.

The spelling of 161910865902 in words is "one hundred sixty-one billion, nine hundred ten million, eight hundred sixty-five thousand, nine hundred two".