129173056970 has 32 divisors (see below), whose sum is σ = 238707025920. Its totient is φ = 50307325120.

The previous prime is 129173056967. The next prime is 129173056981. The reversal of 129173056970 is 79650371921.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 860810 + ... + 999669.

It is an arithmetic number, because the mean of its divisors is an integer number (7459594560).

Almost surely, 2^129173056970 is an apocalyptic number.

129173056970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129173056970 is a deficient number, since it is larger than the sum of its proper divisors (109533968950).

129173056970 is a wasteful number, since it uses less digits than its factorization.

129173056970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1860670.

The product of its (nonzero) digits is 714420, while the sum is 50.

The spelling of 129173056970 in words is "one hundred twenty-nine billion, one hundred seventy-three million, fifty-six thousand, nine hundred seventy".