64274864056 has 64 divisors (see below), whose sum is σ = 135479141280. Its totient is φ = 28390279680.

The previous prime is 64274864033. The next prime is 64274864089. The reversal of 64274864056 is 65046847246.

It is a super-2 number, since 2×64274864056² (a number of 22 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (52) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (52).

It is a junction number, because it is equal to n+sod(n) for n = 64274863994 and 64274864012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 97815 + ... + 371641.

Almost surely, 2^64274864056 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 64274864056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67739570640).

64274864056 is an abundant number, since it is smaller than the sum of its proper divisors (71204277224).

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

64274864056 is a wasteful number, since it uses less digits than its factorization.

64274864056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273944 (or 273940 counting only the distinct ones).

The product of its (nonzero) digits is 7741440, while the sum is 52.

The spelling of 64274864056 in words is "sixty-four billion, two hundred seventy-four million, eight hundred sixty-four thousand, fifty-six".