64456939452 has 24 divisors (see below), whose sum is σ = 150404110416. Its totient is φ = 21484991488.

The previous prime is 64456939451. The next prime is 64456939489. The reversal of 64456939452 is 25493965446.

It is a junction number, because it is equal to n+sod(n) for n = 64456939392 and 64456939401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64456939451) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 485338 + ... + 603710.

It is an arithmetic number, because the mean of its divisors is an integer number (6266837934).

Almost surely, 2^64456939452 is an apocalyptic number.

It is an amenable number.

64456939452 is an abundant number, since it is smaller than the sum of its proper divisors (85947170964).

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

64456939452 is a wasteful number, since it uses less digits than its factorization.

64456939452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163757 (or 163755 counting only the distinct ones).

The product of its digits is 27993600, while the sum is 57.

The spelling of 64456939452 in words is "sixty-four billion, four hundred fifty-six million, nine hundred thirty-nine thousand, four hundred fifty-two".