129278953404 has 72 divisors (see below), whose sum is σ = 327889991520. Its totient is φ = 42947978112.

The previous prime is 129278953387. The next prime is 129278953411. The reversal of 129278953404 is 404359872921.

129278953404 is a `hidden beast` number, since 1 + 2 + 9 + 27 + 89 + 534 + 0 + 4 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14159889 + ... + 14169015.

It is an arithmetic number, because the mean of its divisors is an integer number (4554027660).

Almost surely, 2^129278953404 is an apocalyptic number.

It is an amenable number.

129278953404 is an abundant number, since it is smaller than the sum of its proper divisors (198611038116).

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

129278953404 is a wasteful number, since it uses less digits than its factorization.

129278953404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10419 (or 10414 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 54.

The spelling of 129278953404 in words is "one hundred twenty-nine billion, two hundred seventy-eight million, nine hundred fifty-three thousand, four hundred four".