561497356 has 24 divisors (see below), whose sum is σ = 1126250496. Its totient is φ = 239944080.

The previous prime is 561497341. The next prime is 561497359. The reversal of 561497356 is 653794165.

It is not an unprimeable number, because it can be changed into a prime (561497359) 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, 19180 + ... + 38611.

It is an arithmetic number, because the mean of its divisors is an integer number (46927104).

Almost surely, 2^561497356 is an apocalyptic number.

It is an amenable number.

561497356 is an abundant number, since it is smaller than the sum of its proper divisors (564753140).

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

561497356 is a wasteful number, since it uses less digits than its factorization.

561497356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58149 (or 58147 counting only the distinct ones).

The product of its digits is 680400, while the sum is 46.

The square root of 561497356 is about 23695.9354320525. The cubic root of 561497356 is about 824.9910527343.

The spelling of 561497356 in words is "five hundred sixty-one million, four hundred ninety-seven thousand, three hundred fifty-six".