64273861572 has 24 divisors (see below), whose sum is σ = 150146148096. Its totient is φ = 21399791328.

The previous prime is 64273861507. The next prime is 64273861573. The reversal of 64273861572 is 27516837246.

It is a happy number.

It is a super-2 number, since 2×64273861572² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64273861573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3092863 + ... + 3113574.

It is an arithmetic number, because the mean of its divisors is an integer number (6256089504).

Almost surely, 2^64273861572 is an apocalyptic number.

It is an amenable number.

64273861572 is an abundant number, since it is smaller than the sum of its proper divisors (85872286524).

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

64273861572 is a wasteful number, since it uses less digits than its factorization.

64273861572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6207307 (or 6207305 counting only the distinct ones).

The product of its digits is 3386880, while the sum is 51.

The spelling of 64273861572 in words is "sixty-four billion, two hundred seventy-three million, eight hundred sixty-one thousand, five hundred seventy-two".