13900012765 has 8 divisors (see below), whose sum is σ = 17255188440.
Its totient is φ = 10736561472.
The previous prime is 13900012751. The next prime is 13900012769. The reversal of 13900012765 is 56721000931.
It can be written as a sum of positive squares in 4 ways, for example, as 5862352356 + 8037660409 = 76566^2 + 89653^2
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 13900012765 - 25 = 13900012733 is a prime.
It is a self number, because there is not a number n which added to its sum of digits gives 13900012765.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (13900012769) 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, 47930934 + ... + 47931223.
It is an arithmetic number, because the mean of its divisors is an integer number (2156898555).
Almost surely, 213900012765 is an apocalyptic number.
It is an amenable number.
13900012765 is a deficient number, since it is larger than the sum of its proper divisors (3355175675).
13900012765 is an equidigital number, since it uses as much as digits as its factorization.
13900012765 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 95862191.
The product of its (nonzero) digits is 11340, while the sum is 34.
The spelling of 13900012765 in words is "thirteen billion, nine hundred million, twelve thousand, seven hundred sixty-five".