64722236530 has 48 divisors (see below), whose sum is σ = 135680189400. Its totient is φ = 22164323328.

The previous prime is 64722236503. The next prime is 64722236563. The reversal of 64722236530 is 3563222746.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 55223590009 + 9498646521 = 234997^2 + 97461^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 340546 + ... + 495394.

Almost surely, 2^64722236530 is an apocalyptic number.

64722236530 is an abundant number, since it is smaller than the sum of its proper divisors (70957952870).

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

64722236530 is a wasteful number, since it uses less digits than its factorization.

64722236530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155723 (or 155716 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 40.

The spelling of 64722236530 in words is "sixty-four billion, seven hundred twenty-two million, two hundred thirty-six thousand, five hundred thirty".