126977399524 has 12 divisors (see below), whose sum is σ = 222221814444. Its totient is φ = 63485452544.

The previous prime is 126977399473. The next prime is 126977399531. The reversal of 126977399524 is 425993779621.

It can be written as a sum of positive squares in 2 ways, for example, as 88733685924 + 38243713600 = 297882^2 + 195560^2 .

It is a super-2 number, since 2×126977399524² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 722737 + ... + 881080.

It is an arithmetic number, because the mean of its divisors is an integer number (18518484537).

Almost surely, 2^126977399524 is an apocalyptic number.

It is an amenable number.

126977399524 is a deficient number, since it is larger than the sum of its proper divisors (95244414920).

126977399524 is a wasteful number, since it uses less digits than its factorization.

126977399524 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1623614 (or 1623612 counting only the distinct ones).

The product of its digits is 51438240, while the sum is 64.

The spelling of 126977399524 in words is "one hundred twenty-six billion, nine hundred seventy-seven million, three hundred ninety-nine thousand, five hundred twenty-four".