64157334995749 has 2 divisors, whose sum is σ = 64157334995750. Its totient is φ = 64157334995748.

The previous prime is 64157334995657. The next prime is 64157334995753. The reversal of 64157334995749 is 94759943375146.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60579914556100 + 3577420439649 = 7783310^2 + 1891407^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64157334995749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64157334995449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32078667497874 + 32078667497875.

It is an arithmetic number, because the mean of its divisors is an integer number (32078667497875).

Almost surely, 2^{64157334995749} is an apocalyptic number.

It is an amenable number.

64157334995749 is a deficient number, since it is larger than the sum of its proper divisors (1).

64157334995749 is an equidigital number, since it uses as much as digits as its factorization.

64157334995749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3086294400, while the sum is 76.

The spelling of 64157334995749 in words is "sixty-four trillion, one hundred fifty-seven billion, three hundred thirty-four million, nine hundred ninety-five thousand, seven hundred forty-nine".