8400801874981 has 2 divisors, whose sum is σ = 8400801874982. Its totient is φ = 8400801874980.

The previous prime is 8400801874973. The next prime is 8400801875113. The reversal of 8400801874981 is 1894781080048.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7508334337956 + 892467537025 = 2740134^2 + 944705^2 .

It is a cyclic number.

It is not a de Polignac number, because 8400801874981 - 2³ = 8400801874973 is a prime.

It is a super-2 number, since 2×8400801874981² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8400801874901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4200400937490 + 4200400937491.

It is an arithmetic number, because the mean of its divisors is an integer number (4200400937491).

Almost surely, 2^{8400801874981} is an apocalyptic number.

It is an amenable number.

8400801874981 is a deficient number, since it is larger than the sum of its proper divisors (1).

8400801874981 is an equidigital number, since it uses as much as digits as its factorization.

8400801874981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4128768, while the sum is 58.

The spelling of 8400801874981 in words is "eight trillion, four hundred billion, eight hundred one million, eight hundred seventy-four thousand, nine hundred eighty-one".