981237529018 has 8 divisors (see below), whose sum is σ = 1493824298112. Its totient is φ = 483296096316.

The previous prime is 981237529009. The next prime is 981237529021. The reversal of 981237529018 is 810925732189.

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 981237529018.

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, 3661333930 + ... + 3661334197.

It is an arithmetic number, because the mean of its divisors is an integer number (186728037264).

Almost surely, 2^981237529018 is an apocalyptic number.

981237529018 is a deficient number, since it is larger than the sum of its proper divisors (512586769094).

981237529018 is a wasteful number, since it uses less digits than its factorization.

981237529018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7322668196.

The product of its (nonzero) digits is 2177280, while the sum is 55.

The spelling of 981237529018 in words is "nine hundred eighty-one billion, two hundred thirty-seven million, five hundred twenty-nine thousand, eighteen".