13890686415 has 12 divisors (see below), whose sum is σ = 22225828632. Its totient is φ = 7408122640.

The previous prime is 13890686413. The next prime is 13890686443. The reversal of 13890686415 is 51468609831.

It is not a de Polignac number, because 13890686415 - 2¹ = 13890686413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13890686413) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 441250 + ... + 471680.

It is an arithmetic number, because the mean of its divisors is an integer number (1852152386).

Almost surely, 2^13890686415 is an apocalyptic number.

13890686415 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

13890686415 is a deficient number, since it is larger than the sum of its proper divisors (8335142217).

13890686415 is an frugal number, since it uses more digits than its factorization.

13890686415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60870 (or 30439 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 51.

The spelling of 13890686415 in words is "thirteen billion, eight hundred ninety million, six hundred eighty-six thousand, four hundred fifteen".