129552275456 has 48 divisors (see below), whose sum is σ = 262690056720. Its totient is φ = 63863726080.

The previous prime is 129552275443. The next prime is 129552275473. The reversal of 129552275456 is 654572255921.

It is a junction number, because it is equal to n+sod(n) for n = 129552275398 and 129552275407.

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, 300071 + ... + 590886.

It is an arithmetic number, because the mean of its divisors is an integer number (5472709515).

Almost surely, 2^129552275456 is an apocalyptic number.

129552275456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

129552275456 is an abundant number, since it is smaller than the sum of its proper divisors (133137781264).

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

129552275456 is an frugal number, since it uses more digits than its factorization.

129552275456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 891050 (or 891030 counting only the distinct ones).

The product of its digits is 7560000, while the sum is 53.

The spelling of 129552275456 in words is "one hundred twenty-nine billion, five hundred fifty-two million, two hundred seventy-five thousand, four hundred fifty-six".