126639776792356 has 243 divisors, whose sum is σ = 248792500767699. Its totient is φ = 56393208460800.

The previous prime is 126639776792339. The next prime is 126639776792359. The reversal of 126639776792356 is 653297677936621.

The square root of 126639776792356 is 11253434.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 75477000062500 + 51162776729856 = 8687750^2 + 7152816^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126639776792359) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 543518355216 + ... + 543518355448.

Almost surely, 2^{126639776792356} is an apocalyptic number.

126639776792356 is the 11253434-th square number.

It is an amenable number.

126639776792356 is a deficient number, since it is larger than the sum of its proper divisors (122152723975343).

126639776792356 is an equidigital number, since it uses as much as digits as its factorization.

126639776792356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 652 (or 326 counting only the distinct ones).

The product of its digits is 6481218240, while the sum is 79.

The spelling of 126639776792356 in words is "one hundred twenty-six trillion, six hundred thirty-nine billion, seven hundred seventy-six million, seven hundred ninety-two thousand, three hundred fifty-six".