64925745020449 has 16 divisors (see below), whose sum is σ = 65192108851584. Its totient is φ = 64659776688000.

The previous prime is 64925745020407. The next prime is 64925745020453. The reversal of 64925745020449 is 94402054752946.

It is a cyclic number.

It is not a de Polignac number, because 64925745020449 - 2⁷ = 64925745020321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64925745020849) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2585537404 + ... + 2585562514.

It is an arithmetic number, because the mean of its divisors is an integer number (4074506803224).

Almost surely, 2^{64925745020449} is an apocalyptic number.

It is an amenable number.

64925745020449 is a deficient number, since it is larger than the sum of its proper divisors (266363831135).

64925745020449 is a wasteful number, since it uses less digits than its factorization.

64925745020449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32568.

The product of its (nonzero) digits is 87091200, while the sum is 61.

The spelling of 64925745020449 in words is "sixty-four trillion, nine hundred twenty-five billion, seven hundred forty-five million, twenty thousand, four hundred forty-nine".