64145872252 has 24 divisors (see below), whose sum is σ = 139954631040. Its totient is φ = 24991898160.

The previous prime is 64145872213. The next prime is 64145872303. The reversal of 64145872252 is 25227854146.

It is a super-2 number, since 2×64145872252² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104132602 + ... + 104133217.

It is an arithmetic number, because the mean of its divisors is an integer number (5831442960).

Almost surely, 2^64145872252 is an apocalyptic number.

It is an amenable number.

64145872252 is an abundant number, since it is smaller than the sum of its proper divisors (75808758788).

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

64145872252 is a wasteful number, since it uses less digits than its factorization.

64145872252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208265841 (or 208265839 counting only the distinct ones).

The product of its digits is 1075200, while the sum is 46.

The spelling of 64145872252 in words is "sixty-four billion, one hundred forty-five million, eight hundred seventy-two thousand, two hundred fifty-two".