56635647 has 4 divisors (see below), whose sum is σ = 75514200. Its totient is φ = 37757096.

The previous prime is 56635643. The next prime is 56635661. The reversal of 56635647 is 74653665.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 56635647 - 2² = 56635643 is a prime.

It is a super-2 number, since 2×56635647² = 6415193022217218, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 56635599 and 56635608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56635643) 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, 9439272 + ... + 9439277.

It is an arithmetic number, because the mean of its divisors is an integer number (18878550).

Almost surely, 2^56635647 is an apocalyptic number.

56635647 is a deficient number, since it is larger than the sum of its proper divisors (18878553).

56635647 is a wasteful number, since it uses less digits than its factorization.

56635647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18878552.

The product of its digits is 453600, while the sum is 42.

The square root of 56635647 is about 7525.6658841594. The cubic root of 56635647 is about 384.0283521275.

The spelling of 56635647 in words is "fifty-six million, six hundred thirty-five thousand, six hundred forty-seven".