129634690838 has 8 divisors (see below), whose sum is σ = 202906472688. Its totient is φ = 61999199944.

The previous prime is 129634690813. The next prime is 129634690877. The reversal of 129634690838 is 838096436921.

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

It is a super-2 number, since 2×129634690838² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1409072681 + ... + 1409072772.

It is an arithmetic number, because the mean of its divisors is an integer number (25363309086).

Almost surely, 2^129634690838 is an apocalyptic number.

129634690838 is a deficient number, since it is larger than the sum of its proper divisors (73271781850).

129634690838 is a wasteful number, since it uses less digits than its factorization.

129634690838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2818145478.

The product of its (nonzero) digits is 13436928, while the sum is 59.

The spelling of 129634690838 in words is "one hundred twenty-nine billion, six hundred thirty-four million, six hundred ninety thousand, eight hundred thirty-eight".