64157334995744 has 96 divisors (see below), whose sum is σ = 129843863694720. Its totient is φ = 31182739402752.

The previous prime is 64157334995657. The next prime is 64157334995749. The reversal of 64157334995744 is 44759943375146.

It is a super-2 number, since 2×64157334995744² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64157334995749) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8438419847 + ... + 8438427449.

It is an arithmetic number, because the mean of its divisors is an integer number (1352540246820).

Almost surely, 2^{64157334995744} 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 64157334995744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64921931847360).

64157334995744 is an abundant number, since it is smaller than the sum of its proper divisors (65686528698976).

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

64157334995744 is a wasteful number, since it uses less digits than its factorization.

64157334995744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13322 (or 13314 counting only the distinct ones).

The product of its digits is 1371686400, while the sum is 71.

The spelling of 64157334995744 in words is "sixty-four trillion, one hundred fifty-seven billion, three hundred thirty-four million, nine hundred ninety-five thousand, seven hundred forty-four".