13780932981 has 8 divisors (see below), whose sum is σ = 18556504224. Its totient is φ = 9096325200.

The previous prime is 13780932953. The next prime is 13780932983. The reversal of 13780932981 is 18923908731.

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

It is not a de Polignac number, because 13780932981 - 2⁶ = 13780932917 is a prime.

It is a super-2 number, since 2×13780932981² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13780932983) 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, 22740511 + ... + 22741116.

It is an arithmetic number, because the mean of its divisors is an integer number (2319563028).

Almost surely, 2^13780932981 is an apocalyptic number.

It is an amenable number.

13780932981 is a deficient number, since it is larger than the sum of its proper divisors (4775571243).

13780932981 is a wasteful number, since it uses less digits than its factorization.

13780932981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45481731.

The product of its (nonzero) digits is 653184, while the sum is 51.

The spelling of 13780932981 in words is "thirteen billion, seven hundred eighty million, nine hundred thirty-two thousand, nine hundred eighty-one".