64799612497 has 2 divisors, whose sum is σ = 64799612498. Its totient is φ = 64799612496.

The previous prime is 64799612483. The next prime is 64799612531. The reversal of 64799612497 is 79421699746.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54346799376 + 10452813121 = 233124^2 + 102239^2 .

It is a cyclic number.

It is not a de Polignac number, because 64799612497 - 2¹⁹ = 64799088209 is a prime.

It is a super-2 number, since 2×64799612497² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (64799612467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32399806248 + 32399806249.

It is an arithmetic number, because the mean of its divisors is an integer number (32399806249).

Almost surely, 2^64799612497 is an apocalyptic number.

It is an amenable number.

64799612497 is a deficient number, since it is larger than the sum of its proper divisors (1).

64799612497 is an equidigital number, since it uses as much as digits as its factorization.

64799612497 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41150592, while the sum is 64.

The spelling of 64799612497 in words is "sixty-four billion, seven hundred ninety-nine million, six hundred twelve thousand, four hundred ninety-seven".