64405876 has 6 divisors (see below), whose sum is σ = 112710290. Its totient is φ = 32202936.

The previous prime is 64405867. The next prime is 64405889. The reversal of 64405876 is 67850446.

It can be written as a sum of positive squares in only one way, i.e., 58155876 + 6250000 = 7626^2 + 2500^2 .

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, 8050731 + ... + 8050738.

Almost surely, 2^64405876 is an apocalyptic number.

It is an amenable number.

64405876 is a deficient number, since it is larger than the sum of its proper divisors (48304414).

64405876 is a wasteful number, since it uses less digits than its factorization.

64405876 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16101473 (or 16101471 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 40.

The square root of 64405876 is about 8025.3271584403. The cubic root of 64405876 is about 400.8437937785.

The spelling of 64405876 in words is "sixty-four million, four hundred five thousand, eight hundred seventy-six".