161376502978 has 8 divisors (see below), whose sum is σ = 242066500668. Its totient is φ = 80687669424.

The previous prime is 161376502951. The next prime is 161376502997. The reversal of 161376502978 is 879205673161.

161376502978 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 161028046089 + 348456889 = 401283^2 + 18667^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 278200 + ... + 632572.

Almost surely, 2^161376502978 is an apocalyptic number.

161376502978 is a deficient number, since it is larger than the sum of its proper divisors (80689997690).

161376502978 is a wasteful number, since it uses less digits than its factorization.

161376502978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 582068.

The product of its (nonzero) digits is 3810240, while the sum is 55.

The spelling of 161376502978 in words is "one hundred sixty-one billion, three hundred seventy-six million, five hundred two thousand, nine hundred seventy-eight".