126577137697 has 2 divisors, whose sum is σ = 126577137698. Its totient is φ = 126577137696.

The previous prime is 126577137641. The next prime is 126577137767. The reversal of 126577137697 is 796731775621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 123531863841 + 3045273856 = 351471^2 + 55184^2 .

It is a cyclic number.

It is not a de Polignac number, because 126577137697 - 2⁷ = 126577137569 is a prime.

It is not a weakly prime, because it can be changed into another prime (126577137637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63288568848 + 63288568849.

It is an arithmetic number, because the mean of its divisors is an integer number (63288568849).

Almost surely, 2^126577137697 is an apocalyptic number.

It is an amenable number.

126577137697 is a deficient number, since it is larger than the sum of its proper divisors (1).

126577137697 is an equidigital number, since it uses as much as digits as its factorization.

126577137697 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23337720, while the sum is 61.

The spelling of 126577137697 in words is "one hundred twenty-six billion, five hundred seventy-seven million, one hundred thirty-seven thousand, six hundred ninety-seven".