255882861402921 has 63 divisors (see below), whose sum is σ = 401069975703789. Its totient is φ = 163165345184952.

The previous prime is 255882861402901. The next prime is 255882861403003. The reversal of 255882861402921 is 129204168288552.

The square root of 255882861402921 is 15996339.

It is a perfect power (a square), and thus also a powerful number.

255882861402921 is a `hidden beast` number, since 2 + 5 + 5 + 8 + 8 + 2 + 8 + 614 + 0 + 2 + 9 + 2 + 1 = 666.

It is not a de Polignac number, because 255882861402921 - 2²¹ = 255882859305769 is a prime.

It is not an unprimeable number, because it can be changed into a prime (255882861402901) by changing a digit.

It is a polite number, since it can be written in 62 ways as a sum of consecutive naturals, for example, 9933713640 + ... + 9933739398.

Almost surely, 2^{255882861402921} is an apocalyptic number.

255882861402921 is the 15996339-th square number.

255882861402921 is the 7998170-th centered octagonal number.

It is an amenable number.

255882861402921 is a deficient number, since it is larger than the sum of its proper divisors (145187114300868).

255882861402921 is an frugal number, since it uses more digits than its factorization.

255882861402921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51582 (or 25785 counting only the distinct ones).

The product of its (nonzero) digits is 44236800, while the sum is 63.

The spelling of 255882861402921 in words is "two hundred fifty-five trillion, eight hundred eighty-two billion, eight hundred sixty-one million, four hundred two thousand, nine hundred twenty-one".