9881422501787 has 2 divisors, whose sum is σ = 9881422501788. Its totient is φ = 9881422501786.

The previous prime is 9881422501673. The next prime is 9881422501799. The reversal of 9881422501787 is 7871052241889.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 9881422501787 - 2⁴² = 5483375990683 is a prime.

It is not a weakly prime, because it can be changed into another prime (9881422501487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4940711250893 + 4940711250894.

It is an arithmetic number, because the mean of its divisors is an integer number (4940711250894).

Almost surely, 2^{9881422501787} is an apocalyptic number.

9881422501787 is a deficient number, since it is larger than the sum of its proper divisors (1).

9881422501787 is an equidigital number, since it uses as much as digits as its factorization.

9881422501787 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18063360, while the sum is 62.

The spelling of 9881422501787 in words is "nine trillion, eight hundred eighty-one billion, four hundred twenty-two million, five hundred one thousand, seven hundred eighty-seven".