126931791569 has 8 divisors (see below), whose sum is σ = 138491601312. Its totient is φ = 115375407840.

The previous prime is 126931791559. The next prime is 126931791577. The reversal of 126931791569 is 965197139621.

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

It is a de Polignac number, because none of the positive numbers 2^k-126931791569 is a prime.

It is a super-2 number, since 2×126931791569² (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 (126931791529) 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, 778724 + ... + 927509.

It is an arithmetic number, because the mean of its divisors is an integer number (17311450164).

Almost surely, 2^126931791569 is an apocalyptic number.

It is an amenable number.

126931791569 is a deficient number, since it is larger than the sum of its proper divisors (11559809743).

126931791569 is a wasteful number, since it uses less digits than its factorization.

126931791569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1713007.

The product of its digits is 5511240, while the sum is 59.

The spelling of 126931791569 in words is "one hundred twenty-six billion, nine hundred thirty-one million, seven hundred ninety-one thousand, five hundred sixty-nine".