126499716091 has 32 divisors (see below), whose sum is σ = 149642496000. Its totient is φ = 106874127360.

The previous prime is 126499716061. The next prime is 126499716097. The reversal of 126499716091 is 190617994621.

It is not a de Polignac number, because 126499716091 - 2³¹ = 124352232443 is a prime.

It is a super-2 number, since 2×126499716091² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126499716097) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17365536 + ... + 17372818.

It is an arithmetic number, because the mean of its divisors is an integer number (4676328000).

Almost surely, 2^126499716091 is an apocalyptic number.

126499716091 is a deficient number, since it is larger than the sum of its proper divisors (23142779909).

126499716091 is an frugal number, since it uses more digits than its factorization.

126499716091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8024 (or 8010 counting only the distinct ones).

The product of its (nonzero) digits is 1469664, while the sum is 55.

The spelling of 126499716091 in words is "one hundred twenty-six billion, four hundred ninety-nine million, seven hundred sixteen thousand, ninety-one".