64567725352 has 32 divisors (see below), whose sum is σ = 134872907400. Its totient is φ = 28772884224.

The previous prime is 64567725281. The next prime is 64567725371. The reversal of 64567725352 is 25352776546.

It can be written as a sum of positive squares in 4 ways, for example, as 61104873636 + 3462851716 = 247194^2 + 58846^2 .

It is a Harshad number since it is a multiple of its sum of digits (52).

It is a self number, because there is not a number n which added to its sum of digits gives 64567725352.

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, 10701183 + ... + 10707214.

Almost surely, 2^64567725352 is an apocalyptic number.

It is an amenable number.

64567725352 is an abundant number, since it is smaller than the sum of its proper divisors (70305182048).

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

64567725352 is a wasteful number, since it uses less digits than its factorization.

64567725352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21408445 (or 21408441 counting only the distinct ones).

The product of its digits is 10584000, while the sum is 52.

The spelling of 64567725352 in words is "sixty-four billion, five hundred sixty-seven million, seven hundred twenty-five thousand, three hundred fifty-two".