251187872863 has 2 divisors, whose sum is σ = 251187872864. Its totient is φ = 251187872862.

The previous prime is 251187872801. The next prime is 251187872921. The reversal of 251187872863 is 368278781152.

It is an a-pointer prime, because the next prime (251187872921) can be obtained adding 251187872863 to its sum of digits (58).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 251187872863 - 2¹³ = 251187864671 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 251187872798 and 251187872807.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (251187822863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125593936431 + 125593936432.

It is an arithmetic number, because the mean of its divisors is an integer number (125593936432).

Almost surely, 2^251187872863 is an apocalyptic number.

251187872863 is a deficient number, since it is larger than the sum of its proper divisors (1).

251187872863 is an equidigital number, since it uses as much as digits as its factorization.

251187872863 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9031680, while the sum is 58.

The spelling of 251187872863 in words is "two hundred fifty-one billion, one hundred eighty-seven million, eight hundred seventy-two thousand, eight hundred sixty-three".