64274748721 has 8 divisors (see below), whose sum is σ = 67282610688. Its totient is φ = 61325292000.

The previous prime is 64274748697. The next prime is 64274748731. The reversal of 64274748721 is 12784747246.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64274748721 - 2²⁹ = 63737877809 is a prime.

It is a super-2 number, since 2×64274748721² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64274748731) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14599060 + ... + 14603461.

It is an arithmetic number, because the mean of its divisors is an integer number (8410326336).

Almost surely, 2^64274748721 is an apocalyptic number.

It is an amenable number.

64274748721 is a deficient number, since it is larger than the sum of its proper divisors (3007861967).

64274748721 is a wasteful number, since it uses less digits than its factorization.

64274748721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29202623.

The product of its digits is 4214784, while the sum is 52.

The spelling of 64274748721 in words is "sixty-four billion, two hundred seventy-four million, seven hundred forty-eight thousand, seven hundred twenty-one".