126761878257 has 144 divisors (see below), whose sum is σ = 215439077376. Its totient is φ = 64862078400.

The previous prime is 126761878189. The next prime is 126761878273. The reversal of 126761878257 is 752878167621.

It is not a de Polignac number, because 126761878257 - 2⁷ = 126761878129 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 126761878257.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126761877257) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 1184690398 + ... + 1184690504.

It is an arithmetic number, because the mean of its divisors is an integer number (1496104704).

Almost surely, 2^126761878257 is an apocalyptic number.

It is an amenable number.

126761878257 is a deficient number, since it is larger than the sum of its proper divisors (88677199119).

126761878257 is a wasteful number, since it uses less digits than its factorization.

126761878257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328 (or 238 counting only the distinct ones).

The product of its digits is 15805440, while the sum is 60.

The spelling of 126761878257 in words is "one hundred twenty-six billion, seven hundred sixty-one million, eight hundred seventy-eight thousand, two hundred fifty-seven".