64749455272 has 32 divisors (see below), whose sum is σ = 122721959520. Its totient is φ = 32024499520.

The previous prime is 64749455233. The next prime is 64749455291. The reversal of 64749455272 is 27255494746.

It is an unprimeable number.

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, 523647 + ... + 635377.

It is an arithmetic number, because the mean of its divisors is an integer number (3835061235).

Almost surely, 2^64749455272 is an apocalyptic number.

It is an amenable number.

64749455272 is a deficient number, since it is larger than the sum of its proper divisors (57972504248).

64749455272 is a wasteful number, since it uses less digits than its factorization.

64749455272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112521 (or 112517 counting only the distinct ones).

The product of its digits is 16934400, while the sum is 55.

The spelling of 64749455272 in words is "sixty-four billion, seven hundred forty-nine million, four hundred fifty-five thousand, two hundred seventy-two".