13905780747 has 4 divisors (see below), whose sum is σ = 18541041000. Its totient is φ = 9270520496.

The previous prime is 13905780727. The next prime is 13905780761. The reversal of 13905780747 is 74708750931.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13905780747 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13905780747.

It is not an unprimeable number, because it can be changed into a prime (13905780727) 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, 2317630122 + ... + 2317630127.

It is an arithmetic number, because the mean of its divisors is an integer number (4635260250).

Almost surely, 2^13905780747 is an apocalyptic number.

13905780747 is a deficient number, since it is larger than the sum of its proper divisors (4635260253).

13905780747 is an equidigital number, since it uses as much as digits as its factorization.

13905780747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4635260252.

The product of its (nonzero) digits is 1481760, while the sum is 51.

The spelling of 13905780747 in words is "thirteen billion, nine hundred five million, seven hundred eighty thousand, seven hundred forty-seven".