64938392137 has 2 divisors, whose sum is σ = 64938392138. Its totient is φ = 64938392136.

The previous prime is 64938392131. The next prime is 64938392149. The reversal of 64938392137 is 73129383946.

64938392137 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49488896521 + 15449495616 = 222461^2 + 124296^2 .

It is a cyclic number.

It is not a de Polignac number, because 64938392137 - 2²³ = 64930003529 is a prime.

It is not a weakly prime, because it can be changed into another prime (64938392131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32469196068 + 32469196069.

It is an arithmetic number, because the mean of its divisors is an integer number (32469196069).

Almost surely, 2^64938392137 is an apocalyptic number.

It is an amenable number.

64938392137 is a deficient number, since it is larger than the sum of its proper divisors (1).

64938392137 is an equidigital number, since it uses as much as digits as its factorization.

64938392137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5878656, while the sum is 55.

The spelling of 64938392137 in words is "sixty-four billion, nine hundred thirty-eight million, three hundred ninety-two thousand, one hundred thirty-seven".