64961375 has 8 divisors (see below), whose sum is σ = 81071952. Its totient is φ = 51969000.

The previous prime is 64961357. The next prime is 64961383. The reversal of 64961375 is 57316946.

It is not a de Polignac number, because 64961375 - 2⁶ = 64961311 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 7 ways as a sum of consecutive naturals, for example, 259721 + ... + 259970.

It is an arithmetic number, because the mean of its divisors is an integer number (10133994).

Almost surely, 2^64961375 is an apocalyptic number.

64961375 is a deficient number, since it is larger than the sum of its proper divisors (16110577).

64961375 is an equidigital number, since it uses as much as digits as its factorization.

64961375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 519706 (or 519696 counting only the distinct ones).

The product of its digits is 136080, while the sum is 41.

The square root of 64961375 is about 8059.8619715228. The cubic root of 64961375 is about 401.9929187799.

The spelling of 64961375 in words is "sixty-four million, nine hundred sixty-one thousand, three hundred seventy-five".