129780976000 has 128 divisors (see below), whose sum is σ = 347489120160. Its totient is φ = 47919052800.

The previous prime is 129780975991. The next prime is 129780976009. The reversal of 129780976000 is 679087921.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (129780975991) and next prime (129780976009).

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129780976009) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 103974 + ... + 519973.

Almost surely, 2^129780976000 is an apocalyptic number.

129780976000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129780976000 is an abundant number, since it is smaller than the sum of its proper divisors (217708144160).

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

129780976000 is an equidigital number, since it uses as much as digits as its factorization.

129780976000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 623989 (or 623967 counting only the distinct ones).

The product of its (nonzero) digits is 381024, while the sum is 49.

The spelling of 129780976000 in words is "one hundred twenty-nine billion, seven hundred eighty million, nine hundred seventy-six thousand".