561474878 has 16 divisors (see below), whose sum is σ = 910730304. Its totient is φ = 258600960.

The previous prime is 561474877. The next prime is 561474899. The reversal of 561474878 is 878474165.

It is a happy number.

It is a super-2 number, since 2×561474878² = 630508077250229768, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561474877) 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, 174083 + ... + 177278.

It is an arithmetic number, because the mean of its divisors is an integer number (56920644).

Almost surely, 2^561474878 is an apocalyptic number.

561474878 is a deficient number, since it is larger than the sum of its proper divisors (349255426).

561474878 is a wasteful number, since it uses less digits than its factorization.

561474878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351427.

The product of its digits is 1505280, while the sum is 50.

The square root of 561474878 is about 23695.4611265533. The cubic root of 561474878 is about 824.9800438393.

The spelling of 561474878 in words is "five hundred sixty-one million, four hundred seventy-four thousand, eight hundred seventy-eight".