250797870786861 has 32 divisors (see below), whose sum is σ = 375105664080000. Its totient is φ = 165605969954304.

The previous prime is 250797870786857. The next prime is 250797870786887. The reversal of 250797870786861 is 168687078797052.

It is not a de Polignac number, because 250797870786861 - 2² = 250797870786857 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (250797870786851) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 86881591 + ... + 89721828.

It is an arithmetic number, because the mean of its divisors is an integer number (11722052002500).

Almost surely, 2^{250797870786861} is an apocalyptic number.

It is an amenable number.

250797870786861 is a deficient number, since it is larger than the sum of its proper divisors (124307793293139).

250797870786861 is a wasteful number, since it uses less digits than its factorization.

250797870786861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176603930 (or 176603924 counting only the distinct ones).

The product of its (nonzero) digits is 3982970880, while the sum is 81.

The spelling of 250797870786861 in words is "two hundred fifty trillion, seven hundred ninety-seven billion, eight hundred seventy million, seven hundred eighty-six thousand, eight hundred sixty-one".