129494803680 has 240 divisors, whose sum is σ = 498555543024. Its totient is φ = 31392645120.

The previous prime is 129494803657. The next prime is 129494803687. The reversal of 129494803680 is 86308494921.

129494803680 is a `hidden beast` number, since 12 + 9 + 49 + 480 + 36 + 80 = 666.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129494803687) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 311617 + ... + 596736.

Almost surely, 2^129494803680 is an apocalyptic number.

129494803680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129494803680 is an abundant number, since it is smaller than the sum of its proper divisors (369060739344).

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

129494803680 is a wasteful number, since it uses less digits than its factorization.

129494803680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 908391 (or 908374 counting only the distinct ones).

The product of its (nonzero) digits is 2985984, while the sum is 54.

The spelling of 129494803680 in words is "one hundred twenty-nine billion, four hundred ninety-four million, eight hundred three thousand, six hundred eighty".