255665237420 has 24 divisors (see below), whose sum is σ = 538209722400. Its totient is φ = 102016052352.

The previous prime is 255665237393. The next prime is 255665237483. The reversal of 255665237420 is 24732566552.

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 7 ways as a sum of consecutive naturals, for example, 15619280 + ... + 15635639.

It is an arithmetic number, because the mean of its divisors is an integer number (22425405100).

Almost surely, 2^255665237420 is an apocalyptic number.

255665237420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

255665237420 is an abundant number, since it is smaller than the sum of its proper divisors (282544484980).

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

255665237420 is a wasteful number, since it uses less digits than its factorization.

255665237420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31255337 (or 31255335 counting only the distinct ones).

The product of its (nonzero) digits is 3024000, while the sum is 47.

The spelling of 255665237420 in words is "two hundred fifty-five billion, six hundred sixty-five million, two hundred thirty-seven thousand, four hundred twenty".