255780616 has 32 divisors (see below), whose sum is σ = 590264640. Its totient is φ = 101187648.

The previous prime is 255780601. The next prime is 255780617. The reversal of 255780616 is 616087552.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (255780617) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 174946 + ... + 176401.

It is an arithmetic number, because the mean of its divisors is an integer number (18445770).

Almost surely, 2^255780616 is an apocalyptic number.

255780616 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

255780616 is an abundant number, since it is smaller than the sum of its proper divisors (334484024).

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

255780616 is a wasteful number, since it uses less digits than its factorization.

255780616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351373 (or 351369 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 40.

The square root of 255780616 is about 15993.1427805794. The cubic root of 255780616 is about 634.7789885374.

The spelling of 255780616 in words is "two hundred fifty-five million, seven hundred eighty thousand, six hundred sixteen".