65813766464 has 14 divisors (see below), whose sum is σ = 130599192954. Its totient is φ = 32906883200.

The previous prime is 65813766457. The next prime is 65813766479. The reversal of 65813766464 is 46466731856.

It can be written as a sum of positive squares in only one way, i.e., 55221240064 + 10592526400 = 234992^2 + 102920^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 514169987 + ... + 514170114.

Almost surely, 2^65813766464 is an apocalyptic number.

65813766464 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

65813766464 is a deficient number, since it is larger than the sum of its proper divisors (64785426490).

65813766464 is a wasteful number, since it uses less digits than its factorization.

65813766464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1028340113 (or 1028340103 counting only the distinct ones).

The product of its digits is 17418240, while the sum is 56.

The spelling of 65813766464 in words is "sixty-five billion, eight hundred thirteen million, seven hundred sixty-six thousand, four hundred sixty-four".