56639155 has 16 divisors (see below), whose sum is σ = 72783360. Its totient is φ = 42161152.

The previous prime is 56639153. The next prime is 56639159. The reversal of 56639155 is 55193665.

It is a cyclic number.

It is not a de Polignac number, because 56639155 - 2¹ = 56639153 is a prime.

It is a super-2 number, since 2×56639155² = 6415987758228050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (56639153) 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, 3822 + ... + 11308.

It is an arithmetic number, because the mean of its divisors is an integer number (4548960).

Almost surely, 2^56639155 is an apocalyptic number.

56639155 is a deficient number, since it is larger than the sum of its proper divisors (16144205).

56639155 is a wasteful number, since it uses less digits than its factorization.

56639155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7598.

The product of its digits is 121500, while the sum is 40.

The square root of 56639155 is about 7525.8989496272. The cubic root of 56639155 is about 384.0362808421.

The spelling of 56639155 in words is "fifty-six million, six hundred thirty-nine thousand, one hundred fifty-five".