64277764 has 24 divisors (see below), whose sum is σ = 117065088. Its totient is φ = 30856800.

The previous prime is 64277761. The next prime is 64277771. The reversal of 64277764 is 46777246.

It is a self number, because there is not a number n which added to its sum of digits gives 64277764.

It is not an unprimeable number, because it can be changed into a prime (64277761) 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, 6739 + ... + 13189.

It is an arithmetic number, because the mean of its divisors is an integer number (4877712).

Almost surely, 2^64277764 is an apocalyptic number.

It is an amenable number.

64277764 is a deficient number, since it is larger than the sum of its proper divisors (52787324).

64277764 is a wasteful number, since it uses less digits than its factorization.

64277764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6555 (or 6553 counting only the distinct ones).

The product of its digits is 395136, while the sum is 43.

The square root of 64277764 is about 8017.3414546220. The cubic root of 64277764 is about 400.5778398508.

The spelling of 64277764 in words is "sixty-four million, two hundred seventy-seven thousand, seven hundred sixty-four".