400643003542 has 8 divisors (see below), whose sum is σ = 601009065000. Its totient is φ = 200306648544.

The previous prime is 400643003539. The next prime is 400643003543. The reversal of 400643003542 is 245300346004.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400643003543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7392867 + ... + 7446862.

It is an arithmetic number, because the mean of its divisors is an integer number (75126133125).

Almost surely, 2^400643003542 is an apocalyptic number.

400643003542 is a deficient number, since it is larger than the sum of its proper divisors (200366061458).

400643003542 is a wasteful number, since it uses less digits than its factorization.

400643003542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14853230.

The product of its (nonzero) digits is 34560, while the sum is 31.

Adding to 400643003542 its reverse (245300346004), we get a palindrome (645943349546).

The spelling of 400643003542 in words is "four hundred billion, six hundred forty-three million, three thousand, five hundred forty-two".