56407657561 has 8 divisors (see below), whose sum is σ = 56482181280. Its totient is φ = 56333186112.

The previous prime is 56407657549. The next prime is 56407657597. The reversal of 56407657561 is 16575670465.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 56407657561 - 2⁵ = 56407657529 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 56407657499 and 56407657508.

It is not an unprimeable number, because it can be changed into a prime (56407657511) 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, 2440686 + ... + 2463688.

It is an arithmetic number, because the mean of its divisors is an integer number (7060272660).

Almost surely, 2^56407657561 is an apocalyptic number.

It is an amenable number.

56407657561 is a deficient number, since it is larger than the sum of its proper divisors (74523719).

56407657561 is a wasteful number, since it uses less digits than its factorization.

56407657561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26135.

The product of its (nonzero) digits is 5292000, while the sum is 52.

The spelling of 56407657561 in words is "fifty-six billion, four hundred seven million, six hundred fifty-seven thousand, five hundred sixty-one".