64113555 has 16 divisors (see below), whose sum is σ = 111907584. Its totient is φ = 31085280.

The previous prime is 64113551. The next prime is 64113587. The reversal of 64113555 is 55531146.

It is not a de Polignac number, because 64113555 - 2² = 64113551 is a prime.

It is a super-2 number, since 2×64113555² = 8221095869476050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64113551) 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, 194119 + ... + 194448.

It is an arithmetic number, because the mean of its divisors is an integer number (6994224).

Almost surely, 2^64113555 is an apocalyptic number.

64113555 is a deficient number, since it is larger than the sum of its proper divisors (47794029).

64113555 is a wasteful number, since it uses less digits than its factorization.

64113555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388586.

The product of its digits is 9000, while the sum is 30.

The square root of 64113555 is about 8007.0940421604. The cubic root of 64113555 is about 400.2364331376.

It can be divided in two parts, 641 and 13555, that added together give a triangular number (14196 = T₁₆₈).

The spelling of 64113555 in words is "sixty-four million, one hundred thirteen thousand, five hundred fifty-five".