13861398643 has 8 divisors (see below), whose sum is σ = 14625777600. Its totient is φ = 13100502888.

The previous prime is 13861398641. The next prime is 13861398673. The reversal of 13861398643 is 34689316831.

It is a happy number.

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

It is not a de Polignac number, because 13861398643 - 2¹ = 13861398641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13861398641) 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, 862621 + ... + 878542.

It is an arithmetic number, because the mean of its divisors is an integer number (1828222200).

Almost surely, 2^13861398643 is an apocalyptic number.

13861398643 is a deficient number, since it is larger than the sum of its proper divisors (764378957).

13861398643 is a wasteful number, since it uses less digits than its factorization.

13861398643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1741601.

The product of its digits is 2239488, while the sum is 52.

The spelling of 13861398643 in words is "thirteen billion, eight hundred sixty-one million, three hundred ninety-eight thousand, six hundred forty-three".