64747673748264 has 128 divisors (see below), whose sum is σ = 174789535334400. Its totient is φ = 19868828394240.

The previous prime is 64747673748253. The next prime is 64747673748269. The reversal of 64747673748264 is 46284737674746.

It is a super-2 number, since 2×64747673748264² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64747673748269) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 236238297 + ... + 236512215.

It is an arithmetic number, because the mean of its divisors is an integer number (1365543244800).

Almost surely, 2^{64747673748264} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64747673748264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87394767667200).

64747673748264 is an abundant number, since it is smaller than the sum of its proper divisors (110041861586136).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64747673748264 is a wasteful number, since it uses less digits than its factorization.

64747673748264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275975 (or 275971 counting only the distinct ones).

The product of its digits is 6372753408, while the sum is 75.

The spelling of 64747673748264 in words is "sixty-four trillion, seven hundred forty-seven billion, six hundred seventy-three million, seven hundred forty-eight thousand, two hundred sixty-four".