64156244 has 6 divisors (see below), whose sum is σ = 112273434. Its totient is φ = 32078120.

The previous prime is 64156241. The next prime is 64156259. The reversal of 64156244 is 44265146.

It can be written as a sum of positive squares in only one way, i.e., 63808144 + 348100 = 7988^2 + 590^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 64156244.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64156241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8019527 + ... + 8019534.

It is an arithmetic number, because the mean of its divisors is an integer number (18712239).

Almost surely, 2^64156244 is an apocalyptic number.

It is an amenable number.

64156244 is a deficient number, since it is larger than the sum of its proper divisors (48117190).

64156244 is a wasteful number, since it uses less digits than its factorization.

64156244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16039065 (or 16039063 counting only the distinct ones).

The product of its digits is 23040, while the sum is 32.

The square root of 64156244 is about 8009.7592972573. The cubic root of 64156244 is about 400.3252438028.

The spelling of 64156244 in words is "sixty-four million, one hundred fifty-six thousand, two hundred forty-four".