255616642 has 4 divisors (see below), whose sum is σ = 383424966. Its totient is φ = 127808320.

The previous prime is 255616619. The next prime is 255616681. The reversal of 255616642 is 246616552.

255616642 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 218418841 + 37197801 = 14779^2 + 6099^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63904159 + ... + 63904162.

Almost surely, 2^255616642 is an apocalyptic number.

255616642 is a deficient number, since it is larger than the sum of its proper divisors (127808324).

255616642 is a wasteful number, since it uses less digits than its factorization.

255616642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127808323.

The product of its digits is 86400, while the sum is 37.

The square root of 255616642 is about 15988.0155741730. The cubic root of 255616642 is about 634.6433130226.

The spelling of 255616642 in words is "two hundred fifty-five million, six hundred sixteen thousand, six hundred forty-two".