64126359857 has 36 divisors (see below), whose sum is σ = 76632018624. Its totient is φ = 52554912480.

The previous prime is 64126359853. The next prime is 64126359859. The reversal of 64126359857 is 75895362146.

It is not a de Polignac number, because 64126359857 - 2² = 64126359853 is a prime.

It is a super-2 number, since 2×64126359857² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64126359851) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 208880498 + ... + 208880804.

It is an arithmetic number, because the mean of its divisors is an integer number (2128667184).

Almost surely, 2^64126359857 is an apocalyptic number.

It is an amenable number.

64126359857 is a deficient number, since it is larger than the sum of its proper divisors (12505658767).

64126359857 is an frugal number, since it uses more digits than its factorization.

64126359857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 766 (or 422 counting only the distinct ones).

The product of its digits is 10886400, while the sum is 56.

The spelling of 64126359857 in words is "sixty-four billion, one hundred twenty-six million, three hundred fifty-nine thousand, eight hundred fifty-seven".