402606620291 has 2 divisors, whose sum is σ = 402606620292. Its totient is φ = 402606620290.

The previous prime is 402606620243. The next prime is 402606620293. The reversal of 402606620291 is 192026606204.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 402606620291 - 2²² = 402602425987 is a prime.

Together with 402606620293, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (402606620293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201303310145 + 201303310146.

It is an arithmetic number, because the mean of its divisors is an integer number (201303310146).

Almost surely, 2^402606620291 is an apocalyptic number.

402606620291 is a deficient number, since it is larger than the sum of its proper divisors (1).

402606620291 is an equidigital number, since it uses as much as digits as its factorization.

402606620291 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62208, while the sum is 38.

The spelling of 402606620291 in words is "four hundred two billion, six hundred six million, six hundred twenty thousand, two hundred ninety-one".