64936956395520 has 2160 divisors, whose sum is σ = 264681477660600. Its totient is φ = 14707662520320.

The previous prime is 64936956395471. The next prime is 64936956395539. The reversal of 64936956395520 is 2559365963946.

It is a happy number.

64936956395520 is a `hidden beast` number, since 6 + 4 + 9 + 3 + 6 + 9 + 5 + 6 + 3 + 95 + 520 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 1510161776619 + ... + 1510161776661.

Almost surely, 2^{64936956395520} is an apocalyptic number.

64936956395520 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64936956395520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (132340738830300).

64936956395520 is an abundant number, since it is smaller than the sum of its proper divisors (199744521265080).

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

64936956395520 is an equidigital number, since it uses as much as digits as its factorization.

64936956395520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160 (or 87 counting only the distinct ones).

The product of its (nonzero) digits is 1417176000, while the sum is 72.

The spelling of 64936956395520 in words is "sixty-four trillion, nine hundred thirty-six billion, nine hundred fifty-six million, three hundred ninety-five thousand, five hundred twenty".