64260115920 has 960 divisors, whose sum is σ = 292065306624. Its totient is φ = 12227604480.

The previous prime is 64260115883. The next prime is 64260115921. The reversal of 64260115920 is 2951106246.

64260115920 is a `hidden beast` number, since 6 + 4 + 2 + 60 + 1 + 1 + 592 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64260115921) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 117477087 + ... + 117477633.

Almost surely, 2^64260115920 is an apocalyptic number.

64260115920 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 64260115920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (146032653312).

64260115920 is an abundant number, since it is smaller than the sum of its proper divisors (227805190704).

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

64260115920 is a wasteful number, since it uses less digits than its factorization.

64260115920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 760 (or 751 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The spelling of 64260115920 in words is "sixty-four billion, two hundred sixty million, one hundred fifteen thousand, nine hundred twenty".