981372559805 has 8 divisors (see below), whose sum is σ = 1284705896544. Its totient is φ = 713725498000.

The previous prime is 981372559801. The next prime is 981372559927. The reversal of 981372559805 is 508955273189.

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

It is not a de Polignac number, because 981372559805 - 2² = 981372559801 is a prime.

It is a super-2 number, since 2×981372559805² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (981372559801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8921568671 + ... + 8921568780.

It is an arithmetic number, because the mean of its divisors is an integer number (160588237068).

Almost surely, 2^981372559805 is an apocalyptic number.

It is an amenable number.

981372559805 is a deficient number, since it is larger than the sum of its proper divisors (303333336739).

981372559805 is a wasteful number, since it uses less digits than its factorization.

981372559805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17843137467.

The product of its (nonzero) digits is 27216000, while the sum is 62.

The spelling of 981372559805 in words is "nine hundred eighty-one billion, three hundred seventy-two million, five hundred fifty-nine thousand, eight hundred five".