402663791279 has 4 divisors (see below), whose sum is σ = 406227187776. Its totient is φ = 399100394784.

The previous prime is 402663791237. The next prime is 402663791347. The reversal of 402663791279 is 972197366204.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-402663791279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402663791879) 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, 1781698079 + ... + 1781698304.

It is an arithmetic number, because the mean of its divisors is an integer number (101556796944).

Almost surely, 2^402663791279 is an apocalyptic number.

402663791279 is a deficient number, since it is larger than the sum of its proper divisors (3563396497).

402663791279 is a wasteful number, since it uses less digits than its factorization.

402663791279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3563396496.

The product of its (nonzero) digits is 6858432, while the sum is 56.

The spelling of 402663791279 in words is "four hundred two billion, six hundred sixty-three million, seven hundred ninety-one thousand, two hundred seventy-nine".