64769491337 has 2 divisors, whose sum is σ = 64769491338. Its totient is φ = 64769491336.

The previous prime is 64769491313. The next prime is 64769491387. The reversal of 64769491337 is 73319496746.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39985601296 + 24783890041 = 199964^2 + 157429^2 .

It is a cyclic number.

It is not a de Polignac number, because 64769491337 - 2⁶ = 64769491273 is a prime.

It is not a weakly prime, because it can be changed into another prime (64769491387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32384745668 + 32384745669.

It is an arithmetic number, because the mean of its divisors is an integer number (32384745669).

Almost surely, 2^64769491337 is an apocalyptic number.

It is an amenable number.

64769491337 is a deficient number, since it is larger than the sum of its proper divisors (1).

64769491337 is an equidigital number, since it uses as much as digits as its factorization.

64769491337 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20575296, while the sum is 59.

The spelling of 64769491337 in words is "sixty-four billion, seven hundred sixty-nine million, four hundred ninety-one thousand, three hundred thirty-seven".