126791257049940 has 192 divisors, whose sum is σ = 434087756605440. Its totient is φ = 27005459304960.

The previous prime is 126791257049929. The next prime is 126791257049983. The reversal of 126791257049940 is 49940752197621.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 129747882 + ... + 130721441.

It is an arithmetic number, because the mean of its divisors is an integer number (2260873732320).

Almost surely, 2^{126791257049940} is an apocalyptic number.

126791257049940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

126791257049940 is an abundant number, since it is smaller than the sum of its proper divisors (307296499555500).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

126791257049940 is a wasteful number, since it uses less digits than its factorization.

126791257049940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260469422 (or 260469420 counting only the distinct ones).

The product of its (nonzero) digits is 68584320, while the sum is 66.

The spelling of 126791257049940 in words is "one hundred twenty-six trillion, seven hundred ninety-one billion, two hundred fifty-seven million, forty-nine thousand, nine hundred forty".