402780622501 has 2 divisors, whose sum is σ = 402780622502. Its totient is φ = 402780622500.

The previous prime is 402780622493. The next prime is 402780622523. The reversal of 402780622501 is 105226087204.

It is a happy number.

It is a Cunningham number, because it is equal to 634650²+1.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 402780622500 + 1 = 634650^2 + 1^2 .

It is a cyclic number.

It is not a de Polignac number, because 402780622501 - 2³ = 402780622493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402780622001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201390311250 + 201390311251.

It is an arithmetic number, because the mean of its divisors is an integer number (201390311251).

Almost surely, 2^402780622501 is an apocalyptic number.

It is an amenable number.

402780622501 is a deficient number, since it is larger than the sum of its proper divisors (1).

402780622501 is an equidigital number, since it uses as much as digits as its factorization.

402780622501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 53760, while the sum is 37.

The spelling of 402780622501 in words is "four hundred two billion, seven hundred eighty million, six hundred twenty-two thousand, five hundred one".