129786421744 has 20 divisors (see below), whose sum is σ = 287384219824. Its totient is φ = 55622752128.

The previous prime is 129786421729. The next prime is 129786421759. The reversal of 129786421744 is 447124687921.

It is an interprime number because it is at equal distance from previous prime (129786421729) and next prime (129786421759).

It is a super-2 number, since 2×129786421744² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 579403557 + ... + 579403780.

Almost surely, 2^129786421744 is an apocalyptic number.

129786421744 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

129786421744 is an abundant number, since it is smaller than the sum of its proper divisors (157597798080).

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

129786421744 is a wasteful number, since it uses less digits than its factorization.

129786421744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1158807352 (or 1158807346 counting only the distinct ones).

The product of its digits is 5419008, while the sum is 55.

The spelling of 129786421744 in words is "one hundred twenty-nine billion, seven hundred eighty-six million, four hundred twenty-one thousand, seven hundred forty-four".