64970855 has 32 divisors (see below), whose sum is σ = 85857408. Its totient is φ = 47001600.

The previous prime is 64970831. The next prime is 64970863. The reversal of 64970855 is 55807946.

It is not a de Polignac number, because 64970855 - 2⁸ = 64970599 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 358865 + ... + 359045.

It is an arithmetic number, because the mean of its divisors is an integer number (2683044).

Almost surely, 2^64970855 is an apocalyptic number.

64970855 is a deficient number, since it is larger than the sum of its proper divisors (20886553).

64970855 is a wasteful number, since it uses less digits than its factorization.

64970855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347.

The product of its (nonzero) digits is 302400, while the sum is 44.

The square root of 64970855 is about 8060.4500494699. The cubic root of 64970855 is about 402.0124724891.

The spelling of 64970855 in words is "sixty-four million, nine hundred seventy thousand, eight hundred fifty-five".