981397636653 has 24 divisors (see below), whose sum is σ = 1525293475392. Its totient is φ = 559647071424.

The previous prime is 981397636651. The next prime is 981397636669. The reversal of 981397636653 is 356636793189.

It is not a de Polignac number, because 981397636653 - 2¹ = 981397636651 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (981397636651) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6782800 + ... + 6925977.

It is an arithmetic number, because the mean of its divisors is an integer number (63553894808).

Almost surely, 2^981397636653 is an apocalyptic number.

It is an amenable number.

981397636653 is a deficient number, since it is larger than the sum of its proper divisors (543895838739).

981397636653 is a wasteful number, since it uses less digits than its factorization.

981397636653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13709281 (or 13709274 counting only the distinct ones).

The product of its digits is 132269760, while the sum is 66.

The spelling of 981397636653 in words is "nine hundred eighty-one billion, three hundred ninety-seven million, six hundred thirty-six thousand, six hundred fifty-three".