64928061 has 20 divisors (see below), whose sum is σ = 105810144. Its totient is φ = 39349800.

The previous prime is 64928053. The next prime is 64928063. The reversal of 64928061 is 16082946.

64928061 is a `hidden beast` number, since 649 + 2 + 8 + 0 + 6 + 1 = 666.

It is not a de Polignac number, because 64928061 - 2³ = 64928053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64928063) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 35545 + ... + 37326.

Almost surely, 2^64928061 is an apocalyptic number.

It is an amenable number.

64928061 is a deficient number, since it is larger than the sum of its proper divisors (40882083).

64928061 is a wasteful number, since it uses less digits than its factorization.

64928061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72894 (or 72885 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 64928061 is about 8057.7950457926. The cubic root of 64928061 is about 401.9241893131.

The spelling of 64928061 in words is "sixty-four million, nine hundred twenty-eight thousand, sixty-one".