126930897791 has 8 divisors (see below), whose sum is σ = 129095085840. Its totient is φ = 124767137088.

The previous prime is 126930897767. The next prime is 126930897799. The reversal of 126930897791 is 197798039621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 126930897791 - 2²² = 126926703487 is a prime.

It is a super-2 number, since 2×126930897791² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126930897799) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 523715 + ... + 726731.

It is an arithmetic number, because the mean of its divisors is an integer number (16136885730).

Almost surely, 2^126930897791 is an apocalyptic number.

126930897791 is a deficient number, since it is larger than the sum of its proper divisors (2164188049).

126930897791 is a wasteful number, since it uses less digits than its factorization.

126930897791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213673.

The product of its (nonzero) digits is 10287648, while the sum is 62.

The spelling of 126930897791 in words is "one hundred twenty-six billion, nine hundred thirty million, eight hundred ninety-seven thousand, seven hundred ninety-one".