126999782159 has 8 divisors (see below), whose sum is σ = 133742634480. Its totient is φ = 120262795200.

The previous prime is 126999782137. The next prime is 126999782171. The reversal of 126999782159 is 951287999621.

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

It is not a de Polignac number, because 126999782159 - 2⁸ = 126999781903 is a prime.

It is a super-2 number, since 2×126999782159² (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 (126999781159) 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, 1421852 + ... + 1508529.

It is an arithmetic number, because the mean of its divisors is an integer number (16717829310).

Almost surely, 2^126999782159 is an apocalyptic number.

126999782159 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

126999782159 is a deficient number, since it is larger than the sum of its proper divisors (6742852321).

126999782159 is a wasteful number, since it uses less digits than its factorization.

126999782159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2932681.

The product of its digits is 44089920, while the sum is 68.

The spelling of 126999782159 in words is "one hundred twenty-six billion, nine hundred ninety-nine million, seven hundred eighty-two thousand, one hundred fifty-nine".