64955139 has 8 divisors (see below), whose sum is σ = 87159120. Its totient is φ = 43027296.

The previous prime is 64955101. The next prime is 64955141. The reversal of 64955139 is 93155946.

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

It is not a de Polignac number, because 64955139 - 2²⁴ = 48177923 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64955139.

It is not an unprimeable number, because it can be changed into a prime (64955159) 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, 68484 + ... + 69425.

It is an arithmetic number, because the mean of its divisors is an integer number (10894890).

Almost surely, 2^64955139 is an apocalyptic number.

64955139 is a deficient number, since it is larger than the sum of its proper divisors (22203981).

64955139 is a wasteful number, since it uses less digits than its factorization.

64955139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138069.

The product of its digits is 145800, while the sum is 42.

The square root of 64955139 is about 8059.4751069781. The cubic root of 64955139 is about 401.9800551972.

The spelling of 64955139 in words is "sixty-four million, nine hundred fifty-five thousand, one hundred thirty-nine".