13198773631 has 4 divisors (see below), whose sum is σ = 13199018752. Its totient is φ = 13198528512.

The previous prime is 13198773617. The next prime is 13198773641. The reversal of 13198773631 is 13637789131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13198773631 - 2¹¹ = 13198771583 is a prime.

It is a super-2 number, since 2×13198773631² (a number of 21 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 (13198773641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2751 + ... + 162496.

It is an arithmetic number, because the mean of its divisors is an integer number (3299754688).

Almost surely, 2^13198773631 is an apocalyptic number.

13198773631 is a deficient number, since it is larger than the sum of its proper divisors (245121).

13198773631 is an equidigital number, since it uses as much as digits as its factorization.

13198773631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245120.

The product of its digits is 571536, while the sum is 49.

The spelling of 13198773631 in words is "thirteen billion, one hundred ninety-eight million, seven hundred seventy-three thousand, six hundred thirty-one".