561258776 has 16 divisors (see below), whose sum is σ = 1133311200. Its totient is φ = 259042464.

The previous prime is 561258773. The next prime is 561258823. The reversal of 561258776 is 677852165.

It is a super-2 number, since 2×561258776² = 630022827274036352, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 561258776.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561258773) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2698256 + ... + 2698463.

It is an arithmetic number, because the mean of its divisors is an integer number (70831950).

Almost surely, 2^561258776 is an apocalyptic number.

It is an amenable number.

561258776 is an abundant number, since it is smaller than the sum of its proper divisors (572052424).

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

561258776 is a wasteful number, since it uses less digits than its factorization.

561258776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5396738 (or 5396734 counting only the distinct ones).

The product of its digits is 705600, while the sum is 47.

The square root of 561258776 is about 23690.9007004799. The cubic root of 561258776 is about 824.8741900593.

The spelling of 561258776 in words is "five hundred sixty-one million, two hundred fifty-eight thousand, seven hundred seventy-six".