161213384774 has 32 divisors (see below), whose sum is σ = 264512666880. Its totient is φ = 73239024672.

The previous prime is 161213384749. The next prime is 161213384807. The reversal of 161213384774 is 477483312161.

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, 2262617 + ... + 2332779.

It is an arithmetic number, because the mean of its divisors is an integer number (8266020840).

Almost surely, 2^161213384774 is an apocalyptic number.

161213384774 is a deficient number, since it is larger than the sum of its proper divisors (103299282106).

161213384774 is a wasteful number, since it uses less digits than its factorization.

161213384774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71564.

The product of its digits is 677376, while the sum is 47.

The spelling of 161213384774 in words is "one hundred sixty-one billion, two hundred thirteen million, three hundred eighty-four thousand, seven hundred seventy-four".