402880033781 has 2 divisors, whose sum is σ = 402880033782. Its totient is φ = 402880033780.

The previous prime is 402880033747. The next prime is 402880033841. The reversal of 402880033781 is 187330088204.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 304252631281 + 98627402500 = 551591^2 + 314050^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-402880033781 is a prime.

It is a super-5 number, since 5×402880033781⁵ (a number of 59 digits) contains 55555 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402880033081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201440016890 + 201440016891.

It is an arithmetic number, because the mean of its divisors is an integer number (201440016891).

Almost surely, 2^402880033781 is an apocalyptic number.

It is an amenable number.

402880033781 is a deficient number, since it is larger than the sum of its proper divisors (1).

402880033781 is an equidigital number, since it uses as much as digits as its factorization.

402880033781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 258048, while the sum is 44.

The spelling of 402880033781 in words is "four hundred two billion, eight hundred eighty million, thirty-three thousand, seven hundred eighty-one".