64563476 has 6 divisors (see below), whose sum is σ = 112986090. Its totient is φ = 32281736.

The previous prime is 64563469. The next prime is 64563509. The reversal of 64563476 is 67436546.

It can be written as a sum of positive squares in only one way, i.e., 39363076 + 25200400 = 6274^2 + 5020^2 .

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, 8070431 + ... + 8070438.

It is an arithmetic number, because the mean of its divisors is an integer number (18831015).

Almost surely, 2^64563476 is an apocalyptic number.

It is an amenable number.

64563476 is a deficient number, since it is larger than the sum of its proper divisors (48422614).

64563476 is a wasteful number, since it uses less digits than its factorization.

64563476 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16140873 (or 16140871 counting only the distinct ones).

The product of its digits is 362880, while the sum is 41.

The square root of 64563476 is about 8035.1400734524. The cubic root of 64563476 is about 401.1704799343.

The spelling of 64563476 in words is "sixty-four million, five hundred sixty-three thousand, four hundred seventy-six".