64988845 has 8 divisors (see below), whose sum is σ = 78061176. Its totient is φ = 51941376.

The previous prime is 64988843. The next prime is 64988849. The reversal of 64988845 is 54888946.

It can be written as a sum of positive squares in 4 ways, for example, as 7502121 + 57486724 = 2739^2 + 7582^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64988845 - 2¹ = 64988843 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64988792 and 64988801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64988843) 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, 129 + ... + 11401.

It is an arithmetic number, because the mean of its divisors is an integer number (9757647).

Almost surely, 2^64988845 is an apocalyptic number.

It is an amenable number.

64988845 is a deficient number, since it is larger than the sum of its proper divisors (13072331).

64988845 is a wasteful number, since it uses less digits than its factorization.

64988845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12431.

The product of its digits is 2211840, while the sum is 52.

The square root of 64988845 is about 8061.5659148828. The cubic root of 64988845 is about 402.0495739298.

The spelling of 64988845 in words is "sixty-four million, nine hundred eighty-eight thousand, eight hundred forty-five".