64507748 has 6 divisors (see below), whose sum is σ = 112888566. Its totient is φ = 32253872.

The previous prime is 64507699. The next prime is 64507757. The reversal of 64507748 is 84770546.

It can be written as a sum of positive squares in only one way, i.e., 59876644 + 4631104 = 7738^2 + 2152^2 .

It is a super-2 number, since 2×64507748² = 8322499104063008, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8063465 + ... + 8063472.

It is an arithmetic number, because the mean of its divisors is an integer number (18814761).

Almost surely, 2^64507748 is an apocalyptic number.

It is an amenable number.

64507748 is a deficient number, since it is larger than the sum of its proper divisors (48380818).

64507748 is a wasteful number, since it uses less digits than its factorization.

64507748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16126941 (or 16126939 counting only the distinct ones).

The product of its (nonzero) digits is 188160, while the sum is 41.

The square root of 64507748 is about 8031.6715570297. The cubic root of 64507748 is about 401.0550232019.

The spelling of 64507748 in words is "sixty-four million, five hundred seven thousand, seven hundred forty-eight".