126597738721 has 2 divisors, whose sum is σ = 126597738722. Its totient is φ = 126597738720.

The previous prime is 126597738653. The next prime is 126597738877. The reversal of 126597738721 is 127837795621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 104548755600 + 22048983121 = 323340^2 + 148489^2 .

It is a cyclic number.

It is not a de Polignac number, because 126597738721 - 2²¹ = 126595641569 is a prime.

It is not a weakly prime, because it can be changed into another prime (126592738721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63298869360 + 63298869361.

It is an arithmetic number, because the mean of its divisors is an integer number (63298869361).

Almost surely, 2^126597738721 is an apocalyptic number.

It is an amenable number.

126597738721 is a deficient number, since it is larger than the sum of its proper divisors (1).

126597738721 is an equidigital number, since it uses as much as digits as its factorization.

126597738721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8890560, while the sum is 58.

The spelling of 126597738721 in words is "one hundred twenty-six billion, five hundred ninety-seven million, seven hundred thirty-eight thousand, seven hundred twenty-one".