400651520017442 has 8 divisors (see below), whose sum is σ = 600990159262656. Its totient is φ = 200321466929892.

The previous prime is 400651520017433. The next prime is 400651520017457. The reversal of 400651520017442 is 244710025156004.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 400651520017442.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2146422758 + ... + 2146609409.

It is an arithmetic number, because the mean of its divisors is an integer number (75123769907832).

Almost surely, 2^{400651520017442} is an apocalyptic number.

400651520017442 is a deficient number, since it is larger than the sum of its proper divisors (200338639245214).

400651520017442 is a wasteful number, since it uses less digits than its factorization.

400651520017442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4293078832.

The product of its (nonzero) digits is 268800, while the sum is 41.

The spelling of 400651520017442 in words is "four hundred trillion, six hundred fifty-one billion, five hundred twenty million, seventeen thousand, four hundred forty-two".