64555156 has 12 divisors (see below), whose sum is σ = 115727220. Its totient is φ = 31490240.

The previous prime is 64555129. The next prime is 64555163. The reversal of 64555156 is 65155546.

It can be written as a sum of positive squares in 2 ways, for example, as 2775556 + 61779600 = 1666^2 + 7860^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 196651 + ... + 196978.

It is an arithmetic number, because the mean of its divisors is an integer number (9643935).

Almost surely, 2^64555156 is an apocalyptic number.

It is an amenable number.

64555156 is a deficient number, since it is larger than the sum of its proper divisors (51172064).

64555156 is a wasteful number, since it uses less digits than its factorization.

64555156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393674 (or 393672 counting only the distinct ones).

The product of its digits is 90000, while the sum is 37.

The square root of 64555156 is about 8034.6223308877. The cubic root of 64555156 is about 401.1532468588.

It can be divided in two parts, 6455 and 5156, that added together give a palindrome (11611).

The spelling of 64555156 in words is "sixty-four million, five hundred fifty-five thousand, one hundred fifty-six".