402494558138 has 8 divisors (see below), whose sum is σ = 615133192788. Its totient is φ = 197450160544.

The previous prime is 402494558119. The next prime is 402494558233. The reversal of 402494558138 is 831855494204.

It can be written as a sum of positive squares in 2 ways, for example, as 386395262449 + 16099295689 = 621607^2 + 126883^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a self number, because there is not a number n which added to its sum of digits gives 402494558138.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1898559131 + ... + 1898559342.

Almost surely, 2^402494558138 is an apocalyptic number.

402494558138 is a deficient number, since it is larger than the sum of its proper divisors (212638634650).

402494558138 is a wasteful number, since it uses less digits than its factorization.

402494558138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3797118528.

The product of its (nonzero) digits is 5529600, while the sum is 53.

The spelling of 402494558138 in words is "four hundred two billion, four hundred ninety-four million, five hundred fifty-eight thousand, one hundred thirty-eight".