400242662646 has 16 divisors (see below), whose sum is σ = 847572697584. Its totient is φ = 125566325504.

The previous prime is 400242662639. The next prime is 400242662669. The reversal of 400242662646 is 646266242004.

It is a junction number, because it is equal to n+sod(n) for n = 400242662598 and 400242662607.

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, 1961973735 + ... + 1961973938.

It is an arithmetic number, because the mean of its divisors is an integer number (52973293599).

Almost surely, 2^400242662646 is an apocalyptic number.

400242662646 is an abundant number, since it is smaller than the sum of its proper divisors (447330034938).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

400242662646 is a wasteful number, since it uses less digits than its factorization.

400242662646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3923947695.

The product of its (nonzero) digits is 663552, while the sum is 42.

The spelling of 400242662646 in words is "four hundred billion, two hundred forty-two million, six hundred sixty-two thousand, six hundred forty-six".