64452138990 has 64 divisors (see below), whose sum is σ = 160027140672. Its totient is φ = 16601984000.

The previous prime is 64452138983. The next prime is 64452138997. The reversal of 64452138990 is 9983125446.

It is an interprime number because it is at equal distance from previous prime (64452138983) and next prime (64452138997).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64452138997) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 135177 + ... + 383636.

It is an arithmetic number, because the mean of its divisors is an integer number (2500424073).

Almost surely, 2^64452138990 is an apocalyptic number.

64452138990 is an abundant number, since it is smaller than the sum of its proper divisors (95575001682).

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

64452138990 is a wasteful number, since it uses less digits than its factorization.

64452138990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 518965.

The product of its (nonzero) digits is 1866240, while the sum is 51.

The spelling of 64452138990 in words is "sixty-four billion, four hundred fifty-two million, one hundred thirty-eight thousand, nine hundred ninety".