64740136 has 32 divisors (see below), whose sum is σ = 124921440. Its totient is φ = 31440448.

The previous prime is 64740133. The next prime is 64740139. The reversal of 64740136 is 63104746.

It is an interprime number because it is at equal distance from previous prime (64740133) and next prime (64740139).

It is a junction number, because it is equal to n+sod(n) for n = 64740098 and 64740107.

It is not an unprimeable number, because it can be changed into a prime (64740133) 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, 44655 + ... + 46081.

It is an arithmetic number, because the mean of its divisors is an integer number (3903795).

Almost surely, 2^64740136 is an apocalyptic number.

It is an amenable number.

64740136 is a deficient number, since it is larger than the sum of its proper divisors (60181304).

64740136 is a wasteful number, since it uses less digits than its factorization.

64740136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1593 (or 1589 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 64740136 is about 8046.1255272336. The cubic root of 64740136 is about 401.5360438727.

The spelling of 64740136 in words is "sixty-four million, seven hundred forty thousand, one hundred thirty-six".