402402433131442 has 4 divisors (see below), whose sum is σ = 603603649697166. Its totient is φ = 201201216565720.

The previous prime is 402402433131397. The next prime is 402402433131467. The reversal of 402402433131442 is 244131334204204.

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

It can be written as a sum of positive squares in only one way, i.e., 328040595595881 + 74361837535561 = 18111891^2 + 8623331^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100600608282859 + ... + 100600608282862.

Almost surely, 2^{402402433131442} is an apocalyptic number.

402402433131442 is a deficient number, since it is larger than the sum of its proper divisors (201201216565724).

402402433131442 is a wasteful number, since it uses less digits than its factorization.

402402433131442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201201216565723.

The product of its (nonzero) digits is 221184, while the sum is 37.

Adding to 402402433131442 its reverse (244131334204204), we get a palindrome (646533767335646).

The spelling of 402402433131442 in words is "four hundred two trillion, four hundred two billion, four hundred thirty-three million, one hundred thirty-one thousand, four hundred forty-two".