129384831951 has 64 divisors (see below), whose sum is σ = 196446781440. Its totient is φ = 84143512800.

The previous prime is 129384831949. The next prime is 129384832033. The reversal of 129384831951 is 159138483921.

It is a happy number.

129384831951 is a `hidden beast` number, since 12 + 93 + 8 + 483 + 19 + 51 = 666.

It is not a de Polignac number, because 129384831951 - 2¹ = 129384831949 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129384831911) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 112410226 + ... + 112411376.

It is an arithmetic number, because the mean of its divisors is an integer number (3069480960).

Almost surely, 2^129384831951 is an apocalyptic number.

129384831951 is a deficient number, since it is larger than the sum of its proper divisors (67061949489).

129384831951 is a wasteful number, since it uses less digits than its factorization.

129384831951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1833 (or 1827 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 54.

The spelling of 129384831951 in words is "one hundred twenty-nine billion, three hundred eighty-four million, eight hundred thirty-one thousand, nine hundred fifty-one".