161958958356 has 48 divisors (see below), whose sum is σ = 407002780800. Its totient is φ = 49829976192.

The previous prime is 161958958339. The next prime is 161958958379. The reversal of 161958958356 is 653859859161.

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, 2911330 + ... + 2966438.

It is an arithmetic number, because the mean of its divisors is an integer number (8479224600).

Almost surely, 2^161958958356 is an apocalyptic number.

It is an amenable number.

161958958356 is an abundant number, since it is smaller than the sum of its proper divisors (245043822444).

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

161958958356 is a wasteful number, since it uses less digits than its factorization.

161958958356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73968 (or 73966 counting only the distinct ones).

The product of its digits is 69984000, while the sum is 66.

The spelling of 161958958356 in words is "one hundred sixty-one billion, nine hundred fifty-eight million, nine hundred fifty-eight thousand, three hundred fifty-six".