6257561634767 has 2 divisors, whose sum is σ = 6257561634768. Its totient is φ = 6257561634766.

The previous prime is 6257561634679. The next prime is 6257561634901. The reversal of 6257561634767 is 7674361657526.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6257561634767 is a prime.

It is a super-2 number, since 2×6257561634767² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6257561634367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3128780817383 + 3128780817384.

It is an arithmetic number, because the mean of its divisors is an integer number (3128780817384).

Almost surely, 2^{6257561634767} is an apocalyptic number.

6257561634767 is a deficient number, since it is larger than the sum of its proper divisors (1).

6257561634767 is an equidigital number, since it uses as much as digits as its factorization.

6257561634767 is an evil number, because the sum of its binary digits is even.

The product of its digits is 266716800, while the sum is 65.

The spelling of 6257561634767 in words is "six trillion, two hundred fifty-seven billion, five hundred sixty-one million, six hundred thirty-four thousand, seven hundred sixty-seven".