64746864757 has 2 divisors, whose sum is σ = 64746864758. Its totient is φ = 64746864756.

The previous prime is 64746864701. The next prime is 64746864779. The reversal of 64746864757 is 75746864746.

It is a happy number.

64746864757 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51724859761 + 13022004996 = 227431^2 + 114114^2 .

It is a cyclic number.

It is not a de Polignac number, because 64746864757 - 2¹¹ = 64746862709 is a prime.

It is a super-2 number, since 2×64746864757² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64746864797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32373432378 + 32373432379.

It is an arithmetic number, because the mean of its divisors is an integer number (32373432379).

Almost surely, 2^64746864757 is an apocalyptic number.

It is an amenable number.

64746864757 is a deficient number, since it is larger than the sum of its proper divisors (1).

64746864757 is an equidigital number, since it uses as much as digits as its factorization.

64746864757 is an evil number, because the sum of its binary digits is even.

The product of its digits is 189665280, while the sum is 64.

The spelling of 64746864757 in words is "sixty-four billion, seven hundred forty-six million, eight hundred sixty-four thousand, seven hundred fifty-seven".