255499489157 has 4 divisors (see below), whose sum is σ = 278726715456. Its totient is φ = 232272262860.

The previous prime is 255499489129. The next prime is 255499489181. The reversal of 255499489157 is 751984994552.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 255499489157 - 2¹⁴ = 255499472773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255499489457) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11613613133 + ... + 11613613154.

It is an arithmetic number, because the mean of its divisors is an integer number (69681678864).

Almost surely, 2^255499489157 is an apocalyptic number.

It is an amenable number.

255499489157 is a deficient number, since it is larger than the sum of its proper divisors (23227226299).

255499489157 is a wasteful number, since it uses less digits than its factorization.

255499489157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23227226298.

The product of its digits is 163296000, while the sum is 68.

The spelling of 255499489157 in words is "two hundred fifty-five billion, four hundred ninety-nine million, four hundred eighty-nine thousand, one hundred fifty-seven".