810407454881 has 2 divisors, whose sum is σ = 810407454882. Its totient is φ = 810407454880.

The previous prime is 810407454863. The next prime is 810407454973. The reversal of 810407454881 is 188454704018.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 531032838400 + 279374616481 = 728720^2 + 528559^2 .

It is a cyclic number.

It is not a de Polignac number, because 810407454881 - 2⁶ = 810407454817 is a prime.

It is a super-2 number, since 2×810407454881² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (810407454811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 405203727440 + 405203727441.

It is an arithmetic number, because the mean of its divisors is an integer number (405203727441).

Almost surely, 2^810407454881 is an apocalyptic number.

It is an amenable number.

810407454881 is a deficient number, since it is larger than the sum of its proper divisors (1).

810407454881 is an equidigital number, since it uses as much as digits as its factorization.

810407454881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1146880, while the sum is 50.

The spelling of 810407454881 in words is "eight hundred ten billion, four hundred seven million, four hundred fifty-four thousand, eight hundred eighty-one".