64254746521 has 8 divisors (see below), whose sum is σ = 73608426944. Its totient is φ = 54944673840.

The previous prime is 64254746461. The next prime is 64254746551. The reversal of 64254746521 is 12564745246.

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

It is not a de Polignac number, because 64254746521 - 2¹⁷ = 64254615449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64254746551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10898775 + ... + 10904668.

It is an arithmetic number, because the mean of its divisors is an integer number (9201053368).

Almost surely, 2^64254746521 is an apocalyptic number.

It is an amenable number.

64254746521 is a deficient number, since it is larger than the sum of its proper divisors (9353680423).

64254746521 is a wasteful number, since it uses less digits than its factorization.

64254746521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21803871.

The product of its digits is 1612800, while the sum is 46.

The spelling of 64254746521 in words is "sixty-four billion, two hundred fifty-four million, seven hundred forty-six thousand, five hundred twenty-one".