983661036891 has 16 divisors (see below), whose sum is σ = 1412940779040. Its totient is φ = 605113689600.

The previous prime is 983661036877. The next prime is 983661036907. The reversal of 983661036891 is 198630166389.

It is not a de Polignac number, because 983661036891 - 2¹⁹ = 983660512603 is a prime.

It is not an unprimeable number, because it can be changed into a prime (983661036091) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4393096 + ... + 4611573.

It is an arithmetic number, because the mean of its divisors is an integer number (88308798690).

Almost surely, 2^983661036891 is an apocalyptic number.

983661036891 is a deficient number, since it is larger than the sum of its proper divisors (429279742149).

983661036891 is a wasteful number, since it uses less digits than its factorization.

983661036891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9007486.

The product of its (nonzero) digits is 10077696, while the sum is 60.

The spelling of 983661036891 in words is "nine hundred eighty-three billion, six hundred sixty-one million, thirty-six thousand, eight hundred ninety-one".