126399475191 has 16 divisors (see below), whose sum is σ = 183862183680. Its totient is φ = 76602241920.

The previous prime is 126399475171. The next prime is 126399475193. The reversal of 126399475191 is 191574993621.

It is not a de Polignac number, because 126399475191 - 2⁶ = 126399475127 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126399475193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 771391 + ... + 920783.

It is an arithmetic number, because the mean of its divisors is an integer number (11491386480).

Almost surely, 2^126399475191 is an apocalyptic number.

126399475191 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

126399475191 is a deficient number, since it is larger than the sum of its proper divisors (57462708489).

126399475191 is a wasteful number, since it uses less digits than its factorization.

126399475191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175046.

The product of its digits is 3674160, while the sum is 57.

The spelling of 126399475191 in words is "one hundred twenty-six billion, three hundred ninety-nine million, four hundred seventy-five thousand, one hundred ninety-one".