981978042238 has 16 divisors (see below), whose sum is σ = 1473763866624. Its totient is φ = 490723491960.

The previous prime is 981978042211. The next prime is 981978042257. The reversal of 981978042238 is 832240879189.

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, 36749703 + ... + 36776413.

It is an arithmetic number, because the mean of its divisors is an integer number (92110241664).

Almost surely, 2^981978042238 is an apocalyptic number.

981978042238 is a deficient number, since it is larger than the sum of its proper divisors (491785824386).

981978042238 is a wasteful number, since it uses less digits than its factorization.

981978042238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35967.

The product of its (nonzero) digits is 13934592, while the sum is 61.

The spelling of 981978042238 in words is "nine hundred eighty-one billion, nine hundred seventy-eight million, forty-two thousand, two hundred thirty-eight".