64340239152 has 80 divisors (see below), whose sum is σ = 193176564480. Its totient is φ = 18071344896.

The previous prime is 64340239141. The next prime is 64340239157. The reversal of 64340239152 is 25193204346.

It is a self number, because there is not a number n which added to its sum of digits gives 64340239152.

It is not an unprimeable number, because it can be changed into a prime (64340239157) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1602963 + ... + 1642610.

It is an arithmetic number, because the mean of its divisors is an integer number (2414707056).

Almost surely, 2^64340239152 is an apocalyptic number.

It is an amenable number.

64340239152 is an abundant number, since it is smaller than the sum of its proper divisors (128836325328).

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

64340239152 is a wasteful number, since it uses less digits than its factorization.

64340239152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3245650 (or 3245644 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 39.

The spelling of 64340239152 in words is "sixty-four billion, three hundred forty million, two hundred thirty-nine thousand, one hundred fifty-two".