42143609978 has 8 divisors (see below), whose sum is σ = 63216550740. Its totient is φ = 21071426400.

The previous prime is 42143609947. The next prime is 42143610031. The reversal of 42143609978 is 87990634124.

It can be written as a sum of positive squares in 2 ways, for example, as 37491415129 + 4652194849 = 193627^2 + 68207^2 .

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

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, 19793 + ... + 290996.

Almost surely, 2^42143609978 is an apocalyptic number.

42143609978 is a deficient number, since it is larger than the sum of its proper divisors (21072940762).

42143609978 is a wasteful number, since it uses less digits than its factorization.

42143609978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378592.

The product of its (nonzero) digits is 2612736, while the sum is 53.

The spelling of 42143609978 in words is "forty-two billion, one hundred forty-three million, six hundred nine thousand, nine hundred seventy-eight".