561177138 has 32 divisors (see below), whose sum is σ = 1173025152. Its totient is φ = 178640000.

The previous prime is 561177083. The next prime is 561177163. The reversal of 561177138 is 831771165.

It is a junction number, because it is equal to n+sod(n) for n = 561177096 and 561177105.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 93838 + ... + 99638.

It is an arithmetic number, because the mean of its divisors is an integer number (36657036).

Almost surely, 2^561177138 is an apocalyptic number.

561177138 is an abundant number, since it is smaller than the sum of its proper divisors (611848014).

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

561177138 is a wasteful number, since it uses less digits than its factorization.

561177138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6530.

The product of its digits is 35280, while the sum is 39.

The square root of 561177138 is about 23689.1776556300. The cubic root of 561177138 is about 824.8341940436.

The spelling of 561177138 in words is "five hundred sixty-one million, one hundred seventy-seven thousand, one hundred thirty-eight".