64893057620849 has 16 divisors (see below), whose sum is σ = 67740032841600. Its totient is φ = 62048214708480.

The previous prime is 64893057620821. The next prime is 64893057620887. The reversal of 64893057620849 is 94802675039846.

It is a cyclic number.

It is not a de Polignac number, because 64893057620849 - 2⁸ = 64893057620593 is a prime.

It is a super-2 number, since 2×64893057620849² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64893057620249) 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, 794739977 + ... + 794821625.

It is an arithmetic number, because the mean of its divisors is an integer number (4233752052600).

Almost surely, 2^{64893057620849} is an apocalyptic number.

It is an amenable number.

64893057620849 is a deficient number, since it is larger than the sum of its proper divisors (2846975220751).

64893057620849 is a wasteful number, since it uses less digits than its factorization.

64893057620849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94280.

The product of its (nonzero) digits is 627056640, while the sum is 71.

The spelling of 64893057620849 in words is "sixty-four trillion, eight hundred ninety-three billion, fifty-seven million, six hundred twenty thousand, eight hundred forty-nine".