561506457 has 16 divisors (see below), whose sum is σ = 758504448. Its totient is φ = 369448080.

The previous prime is 561506453. The next prime is 561506459. The reversal of 561506457 is 754605165.

It is not a de Polignac number, because 561506457 - 2² = 561506453 is a prime.

It is a super-3 number, since 3×561506457³ (a number of 27 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (561506453) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 93178 + ... + 99020.

It is an arithmetic number, because the mean of its divisors is an integer number (47406528).

Almost surely, 2^561506457 is an apocalyptic number.

It is an amenable number.

561506457 is a deficient number, since it is larger than the sum of its proper divisors (196997991).

561506457 is a wasteful number, since it uses less digits than its factorization.

561506457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6260.

The product of its (nonzero) digits is 126000, while the sum is 39.

The square root of 561506457 is about 23696.1274684283. The cubic root of 561506457 is about 824.9955099847.

The spelling of 561506457 in words is "five hundred sixty-one million, five hundred six thousand, four hundred fifty-seven".