255531617442 has 12 divisors (see below), whose sum is σ = 553651837830. Its totient is φ = 85177205808.

The previous prime is 255531617423. The next prime is 255531617459. The reversal of 255531617442 is 244716135552.

255531617442 is a `hidden beast` number, since 2 + 5 + 5 + 531 + 6 + 1 + 74 + 42 = 666.

It can be written as a sum of positive squares in only one way, i.e., 179317524681 + 76214092761 = 423459^2 + 276069^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7098100467 + ... + 7098100502.

Almost surely, 2^255531617442 is an apocalyptic number.

255531617442 is an abundant number, since it is smaller than the sum of its proper divisors (298120220388).

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

255531617442 is a wasteful number, since it uses less digits than its factorization.

255531617442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14196200977 (or 14196200974 counting only the distinct ones).

The product of its digits is 1008000, while the sum is 45.

The spelling of 255531617442 in words is "two hundred fifty-five billion, five hundred thirty-one million, six hundred seventeen thousand, four hundred forty-two".