255515255678 has 16 divisors (see below), whose sum is σ = 389225697120. Its totient is φ = 125778492000.

The previous prime is 255515255641. The next prime is 255515255719. The reversal of 255515255678 is 876552515552.

It is a super-2 number, since 2×255515255678² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1183913 + ... + 1382996.

It is an arithmetic number, because the mean of its divisors is an integer number (24326606070).

Almost surely, 2^255515255678 is an apocalyptic number.

255515255678 is a deficient number, since it is larger than the sum of its proper divisors (133710441442).

255515255678 is a wasteful number, since it uses less digits than its factorization.

255515255678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2567683.

The product of its digits is 21000000, while the sum is 56.

The spelling of 255515255678 in words is "two hundred fifty-five billion, five hundred fifteen million, two hundred fifty-five thousand, six hundred seventy-eight".