64371831552 has 324 divisors, whose sum is σ = 221183680536. Its totient is φ = 17942077440.

The previous prime is 64371831551. The next prime is 64371831553. The reversal of 64371831552 is 25513817346.

It is a happy number.

64371831552 is a `hidden beast` number, since 64 + 3 + 7 + 1 + 8 + 31 + 552 = 666.

64371831552 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (64371831551) and next prime (64371831553).

It is a junction number, because it is equal to n+sod(n) for n = 64371831498 and 64371831507.

It is not an unprimeable number, because it can be changed into a prime (64371831551) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 4621783 + ... + 4635689.

Almost surely, 2^64371831552 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 64371831552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (110591840268).

64371831552 is an abundant number, since it is smaller than the sum of its proper divisors (156811848984).

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

64371831552 is a wasteful number, since it uses less digits than its factorization.

64371831552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13984 (or 13960 counting only the distinct ones).

The product of its digits is 604800, while the sum is 45.

The spelling of 64371831552 in words is "sixty-four billion, three hundred seventy-one million, eight hundred thirty-one thousand, five hundred fifty-two".