64968402321 has 45 divisors (see below), whose sum is σ = 98262396441. Its totient is φ = 42778530648.

The previous prime is 64968402313. The next prime is 64968402383. The reversal of 64968402321 is 12320486946.

The square root of 64968402321 is 254889.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 64968402321 - 2³ = 64968402313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64968403321) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 291338016 + ... + 291338238.

Almost surely, 2^64968402321 is an apocalyptic number.

64968402321 is the 254889-th square number.

64968402321 is the 127445-th centered octagonal number.

It is an amenable number.

64968402321 is a deficient number, since it is larger than the sum of its proper divisors (33293994120).

64968402321 is an frugal number, since it uses more digits than its factorization.

64968402321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 712 (or 353 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 45.

The spelling of 64968402321 in words is "sixty-four billion, nine hundred sixty-eight million, four hundred two thousand, three hundred twenty-one".