64707644160 has 216 divisors, whose sum is σ = 231104974464. Its totient is φ = 16698654720.

The previous prime is 64707644149. The next prime is 64707644167. The reversal of 64707644160 is 6144670746.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (64707644167) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 266524 + ... + 447716.

Almost surely, 2^64707644160 is an apocalyptic number.

64707644160 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 64707644160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (115552487232).

64707644160 is an abundant number, since it is smaller than the sum of its proper divisors (166397330304).

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

64707644160 is a wasteful number, since it uses less digits than its factorization.

64707644160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181251 (or 181234 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 45.

The spelling of 64707644160 in words is "sixty-four billion, seven hundred seven million, six hundred forty-four thousand, one hundred sixty".