8151974747639 has 2 divisors, whose sum is σ = 8151974747640. Its totient is φ = 8151974747638.

The previous prime is 8151974747533. The next prime is 8151974747659. The reversal of 8151974747639 is 9367474791518.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8151974747639 is a prime.

It is a super-2 number, since 2×8151974747639² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8151974747659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4075987373819 + 4075987373820.

It is an arithmetic number, because the mean of its divisors is an integer number (4075987373820).

Almost surely, 2^{8151974747639} is an apocalyptic number.

8151974747639 is a deficient number, since it is larger than the sum of its proper divisors (1).

8151974747639 is an equidigital number, since it uses as much as digits as its factorization.

8151974747639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 320060160, while the sum is 71.

The spelling of 8151974747639 in words is "eight trillion, one hundred fifty-one billion, nine hundred seventy-four million, seven hundred forty-seven thousand, six hundred thirty-nine".