64740295872 has 420 divisors, whose sum is σ = 224284315464. Its totient is φ = 18411079680.

The previous prime is 64740295847. The next prime is 64740295877. The reversal of 64740295872 is 27859204746.

64740295872 is a `hidden beast` number, since 6 + 474 + 0 + 2 + 95 + 87 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (64740295877) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 71378043 + ... + 71378949.

Almost surely, 2^64740295872 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 64740295872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (112142157732).

64740295872 is an abundant number, since it is smaller than the sum of its proper divisors (159544019592).

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

64740295872 is a wasteful number, since it uses less digits than its factorization.

64740295872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1226 (or 1200 counting only the distinct ones).

The product of its (nonzero) digits is 6773760, while the sum is 54.

The spelling of 64740295872 in words is "sixty-four billion, seven hundred forty million, two hundred ninety-five thousand, eight hundred seventy-two".