129245523127 has 18 divisors (see below), whose sum is σ = 156928681608. Its totient is φ = 104252251392.

The previous prime is 129245523119. The next prime is 129245523131. The reversal of 129245523127 is 721325542921.

It is not a de Polignac number, because 129245523127 - 2³ = 129245523119 is a prime.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129245523227) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 16165843 + ... + 16173835.

Almost surely, 2^129245523127 is an apocalyptic number.

129245523127 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

129245523127 is a deficient number, since it is larger than the sum of its proper divisors (27683158481).

129245523127 is an frugal number, since it uses more digits than its factorization.

129245523127 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16027 (or 8017 counting only the distinct ones).

The product of its digits is 302400, while the sum is 43.

The spelling of 129245523127 in words is "one hundred twenty-nine billion, two hundred forty-five million, five hundred twenty-three thousand, one hundred twenty-seven".