64816772 has 6 divisors (see below), whose sum is σ = 113429358. Its totient is φ = 32408384.

The previous prime is 64816757. The next prime is 64816789. The reversal of 64816772 is 27761846.

It can be written as a sum of positive squares in only one way, i.e., 59691076 + 5125696 = 7726^2 + 2264^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8102093 + ... + 8102100.

It is an arithmetic number, because the mean of its divisors is an integer number (18904893).

Almost surely, 2^64816772 is an apocalyptic number.

It is an amenable number.

64816772 is a deficient number, since it is larger than the sum of its proper divisors (48612586).

64816772 is a wasteful number, since it uses less digits than its factorization.

64816772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16204197 (or 16204195 counting only the distinct ones).

The product of its digits is 112896, while the sum is 41.

The square root of 64816772 is about 8050.8864108246. The cubic root of 64816772 is about 401.6944205459.

The spelling of 64816772 in words is "sixty-four million, eight hundred sixteen thousand, seven hundred seventy-two".