129515399454 has 32 divisors (see below), whose sum is σ = 296371305216. Its totient is φ = 36962386560.

The previous prime is 129515399381. The next prime is 129515399479. The reversal of 129515399454 is 454993515921.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 129515399394 and 129515399403.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1713112 + ... + 1787115.

It is an arithmetic number, because the mean of its divisors is an integer number (9261603288).

Almost surely, 2^129515399454 is an apocalyptic number.

129515399454 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

129515399454 is an abundant number, since it is smaller than the sum of its proper divisors (166855905762).

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

129515399454 is a wasteful number, since it uses less digits than its factorization.

129515399454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3501120.

The product of its digits is 8748000, while the sum is 57.

The spelling of 129515399454 in words is "one hundred twenty-nine billion, five hundred fifteen million, three hundred ninety-nine thousand, four hundred fifty-four".