255616405 has 32 divisors (see below), whose sum is σ = 353779200. Its totient is φ = 175348800.

The previous prime is 255616399. The next prime is 255616433. The reversal of 255616405 is 504616552.

It is not a de Polignac number, because 255616405 - 2¹¹ = 255614357 is a prime.

It is a super-3 number, since 3×255616405³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 345526 + ... + 346264.

It is an arithmetic number, because the mean of its divisors is an integer number (11055600).

Almost surely, 2^255616405 is an apocalyptic number.

It is an amenable number.

255616405 is a deficient number, since it is larger than the sum of its proper divisors (98162795).

255616405 is a wasteful number, since it uses less digits than its factorization.

255616405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1105.

The product of its (nonzero) digits is 36000, while the sum is 34.

The square root of 255616405 is about 15988.0081623697. The cubic root of 255616405 is about 634.6431168819.

The spelling of 255616405 in words is "two hundred fifty-five million, six hundred sixteen thousand, four hundred five".