402980477278 has 4 divisors (see below), whose sum is σ = 604470715920. Its totient is φ = 201490238638.

The previous prime is 402980477261. The next prime is 402980477281. The reversal of 402980477278 is 872774089204.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100745119318 + ... + 100745119321.

It is an arithmetic number, because the mean of its divisors is an integer number (151117678980).

Almost surely, 2^402980477278 is an apocalyptic number.

402980477278 is a deficient number, since it is larger than the sum of its proper divisors (201490238642).

402980477278 is a wasteful number, since it uses less digits than its factorization.

402980477278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201490238641.

The product of its (nonzero) digits is 12644352, while the sum is 58.

The spelling of 402980477278 in words is "four hundred two billion, nine hundred eighty million, four hundred seventy-seven thousand, two hundred seventy-eight".