126919712391 has 8 divisors (see below), whose sum is σ = 169227938304. Its totient is φ = 84612314040.

The previous prime is 126919712377. The next prime is 126919712443. The reversal of 126919712391 is 193217919621.

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

It is not a de Polignac number, because 126919712391 - 2⁷ = 126919712263 is a prime.

It is a super-2 number, since 2×126919712391² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126919712341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 439236 + ... + 668406.

It is an arithmetic number, because the mean of its divisors is an integer number (21153492288).

Almost surely, 2^126919712391 is an apocalyptic number.

126919712391 is a deficient number, since it is larger than the sum of its proper divisors (42308225913).

126919712391 is a wasteful number, since it uses less digits than its factorization.

126919712391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 413781.

The product of its digits is 367416, while the sum is 51.

The spelling of 126919712391 in words is "one hundred twenty-six billion, nine hundred nineteen million, seven hundred twelve thousand, three hundred ninety-one".