64403021224861 has 16 divisors (see below), whose sum is σ = 70844254778880. Its totient is φ = 58060988556480.

The previous prime is 64403021224819. The next prime is 64403021224943. The reversal of 64403021224861 is 16842212030446.

It is a cyclic number.

It is not a de Polignac number, because 64403021224861 - 2¹⁵ = 64403021192093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64403021294861) 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, 35753421 + ... + 37511506.

It is an arithmetic number, because the mean of its divisors is an integer number (4427765923680).

Almost surely, 2^{64403021224861} is an apocalyptic number.

It is an amenable number.

64403021224861 is a deficient number, since it is larger than the sum of its proper divisors (6441233554019).

64403021224861 is a wasteful number, since it uses less digits than its factorization.

64403021224861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73265604.

The product of its (nonzero) digits is 442368, while the sum is 43.

The spelling of 64403021224861 in words is "sixty-four trillion, four hundred three billion, twenty-one million, two hundred twenty-four thousand, eight hundred sixty-one".