255907492129 has 9 divisors (see below), whose sum is σ = 260202846969. Its totient is φ = 251681934960.

The previous prime is 255907492117. The next prime is 255907492171. The reversal of 255907492129 is 921294709552.

The square root of 255907492129 is 505873.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 157843317025 + 98064175104 = 397295^2 + 313152^2 .

It is a de Polignac number, because none of the positive numbers 2^k-255907492129 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 255907492129.

It is not an unprimeable number, because it can be changed into a prime (255907492199) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 30854107 + ... + 30862399.

It is an arithmetic number, because the mean of its divisors is an integer number (28911427441).

Almost surely, 2^255907492129 is an apocalyptic number.

255907492129 is the 505873-rd square number.

255907492129 is the 252937-th centered octagonal number.

It is an amenable number.

255907492129 is a deficient number, since it is larger than the sum of its proper divisors (4295354840).

255907492129 is an frugal number, since it uses more digits than its factorization.

255907492129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16708 (or 8354 counting only the distinct ones).

The product of its (nonzero) digits is 4082400, while the sum is 55.

The spelling of 255907492129 in words is "two hundred fifty-five billion, nine hundred seven million, four hundred ninety-two thousand, one hundred twenty-nine".