13061891639 has 8 divisors (see below), whose sum is σ = 14558145840. Its totient is φ = 11646516096.

The previous prime is 13061891621. The next prime is 13061891651. The reversal of 13061891639 is 93619816031.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 13061891639 - 2²⁰ = 13060843063 is a prime.

It is a super-2 number, since 2×13061891639² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13061891593 and 13061891602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13061891699) 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, 20219324 + ... + 20219969.

It is an arithmetic number, because the mean of its divisors is an integer number (1819768230).

Almost surely, 2^13061891639 is an apocalyptic number.

13061891639 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

13061891639 is a deficient number, since it is larger than the sum of its proper divisors (1496254201).

13061891639 is a wasteful number, since it uses less digits than its factorization.

13061891639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40439329.

The product of its (nonzero) digits is 209952, while the sum is 47.

The spelling of 13061891639 in words is "thirteen billion, sixty-one million, eight hundred ninety-one thousand, six hundred thirty-nine".