64268621697 has 16 divisors (see below), whose sum is σ = 97949416320. Its totient is φ = 36718822272.

The previous prime is 64268621693. The next prime is 64268621761. The reversal of 64268621697 is 79612686246.

It is not a de Polignac number, because 64268621697 - 2² = 64268621693 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64268621693) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 123438 + ... + 379175.

It is an arithmetic number, because the mean of its divisors is an integer number (6121838520).

Almost surely, 2^64268621697 is an apocalyptic number.

It is an amenable number.

64268621697 is a deficient number, since it is larger than the sum of its proper divisors (33680794623).

64268621697 is a wasteful number, since it uses less digits than its factorization.

64268621697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508712.

The product of its digits is 10450944, while the sum is 57.

The spelling of 64268621697 in words is "sixty-four billion, two hundred sixty-eight million, six hundred twenty-one thousand, six hundred ninety-seven".