401873484781 has 2 divisors, whose sum is σ = 401873484782. Its totient is φ = 401873484780.

The previous prime is 401873484773. The next prime is 401873484791. The reversal of 401873484781 is 187484378104.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 370381788100 + 31491696681 = 608590^2 + 177459^2 .

It is a cyclic number.

It is not a de Polignac number, because 401873484781 - 2³ = 401873484773 is a prime.

It is a super-2 number, since 2×401873484781² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (401873484791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200936742390 + 200936742391.

It is an arithmetic number, because the mean of its divisors is an integer number (200936742391).

Almost surely, 2^401873484781 is an apocalyptic number.

It is an amenable number.

401873484781 is a deficient number, since it is larger than the sum of its proper divisors (1).

401873484781 is an equidigital number, since it uses as much as digits as its factorization.

401873484781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4816896, while the sum is 55.

The spelling of 401873484781 in words is "four hundred one billion, eight hundred seventy-three million, four hundred eighty-four thousand, seven hundred eighty-one".