402780622499 has 4 divisors (see below), whose sum is σ = 402781891800. Its totient is φ = 402779353200.

The previous prime is 402780622493. The next prime is 402780622501. The reversal of 402780622499 is 994226087204.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 402780622499 - 2²⁰ = 402779573923 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 402780622499.

It is not an unprimeable number, because it can be changed into a prime (402780622493) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 317324 + ... + 951974.

It is an arithmetic number, because the mean of its divisors is an integer number (100695472950).

Almost surely, 2^402780622499 is an apocalyptic number.

402780622499 is a deficient number, since it is larger than the sum of its proper divisors (1269301).

402780622499 is an equidigital number, since it uses as much as digits as its factorization.

402780622499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1269300.

The product of its (nonzero) digits is 3483648, while the sum is 53.

The spelling of 402780622499 in words is "four hundred two billion, seven hundred eighty million, six hundred twenty-two thousand, four hundred ninety-nine".