64135970 has 8 divisors (see below), whose sum is σ = 115444764. Its totient is φ = 25654384.

The previous prime is 64135957. The next prime is 64135991. The reversal of 64135970 is 7953146.

It can be written as a sum of positive squares in 2 ways, for example, as 59552089 + 4583881 = 7717^2 + 2141^2 .

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

It is a super-2 number, since 2×64135970² = 8226845295681800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 64135970.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3206789 + ... + 3206808.

Almost surely, 2^64135970 is an apocalyptic number.

64135970 is a deficient number, since it is larger than the sum of its proper divisors (51308794).

64135970 is a wasteful number, since it uses less digits than its factorization.

64135970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6413604.

The product of its (nonzero) digits is 22680, while the sum is 35.

The square root of 64135970 is about 8008.4936161553. The cubic root of 64135970 is about 400.2830704639.

The spelling of 64135970 in words is "sixty-four million, one hundred thirty-five thousand, nine hundred seventy".