861278250751 has 2 divisors, whose sum is σ = 861278250752. Its totient is φ = 861278250750.

The previous prime is 861278250713. The next prime is 861278250761. The reversal of 861278250751 is 157052872168.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 861278250751 - 2¹⁷ = 861278119679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (861278250761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 430639125375 + 430639125376.

It is an arithmetic number, because the mean of its divisors is an integer number (430639125376).

Almost surely, 2^861278250751 is an apocalyptic number.

861278250751 is a deficient number, since it is larger than the sum of its proper divisors (1).

861278250751 is an equidigital number, since it uses as much as digits as its factorization.

861278250751 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1881600, while the sum is 52.

The spelling of 861278250751 in words is "eight hundred sixty-one billion, two hundred seventy-eight million, two hundred fifty thousand, seven hundred fifty-one".