126391264040 has 16 divisors (see below), whose sum is σ = 284380344180. Its totient is φ = 50556505600.

The previous prime is 126391264009. The next prime is 126391264091. The reversal of 126391264040 is 40462193621.

It can be written as a sum of positive squares in 2 ways, for example, as 124054701796 + 2336562244 = 352214^2 + 48338^2 .

It is a junction number, because it is equal to n+sod(n) for n = 126391263985 and 126391264003.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1579890761 + ... + 1579890840.

Almost surely, 2^126391264040 is an apocalyptic number.

126391264040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

126391264040 is an abundant number, since it is smaller than the sum of its proper divisors (157989080140).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

126391264040 is a wasteful number, since it uses less digits than its factorization.

126391264040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3159781612 (or 3159781608 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 38.

The spelling of 126391264040 in words is "one hundred twenty-six billion, three hundred ninety-one million, two hundred sixty-four thousand, forty".