402663791278 has 16 divisors (see below), whose sum is σ = 690964932960. Its totient is φ = 172399159296.

The previous prime is 402663791237. The next prime is 402663791347. The reversal of 402663791278 is 872197366204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14238451 + ... + 14266702.

It is an arithmetic number, because the mean of its divisors is an integer number (43185308310).

Almost surely, 2^402663791278 is an apocalyptic number.

402663791278 is a deficient number, since it is larger than the sum of its proper divisors (288301141682).

402663791278 is a wasteful number, since it uses less digits than its factorization.

402663791278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28506171.

The product of its (nonzero) digits is 6096384, while the sum is 55.

The spelling of 402663791278 in words is "four hundred two billion, six hundred sixty-three million, seven hundred ninety-one thousand, two hundred seventy-eight".