161342776 has 32 divisors (see below), whose sum is σ = 357660000. Its totient is φ = 66761856.

The previous prime is 161342771. The next prime is 161342821. The reversal of 161342776 is 677243161.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161342771) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48051 + ... + 51298.

It is an arithmetic number, because the mean of its divisors is an integer number (11176875).

Almost surely, 2^161342776 is an apocalyptic number.

It is an amenable number.

161342776 is an abundant number, since it is smaller than the sum of its proper divisors (196317224).

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

161342776 is a wasteful number, since it uses less digits than its factorization.

161342776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99391 (or 99387 counting only the distinct ones).

The product of its digits is 42336, while the sum is 37.

The square root of 161342776 is about 12702.0776253336. The cubic root of 161342776 is about 544.3979840712.

The spelling of 161342776 in words is "one hundred sixty-one million, three hundred forty-two thousand, seven hundred seventy-six".