13961997385 has 8 divisors (see below), whose sum is σ = 19147882176. Its totient is φ = 9573941040.

The previous prime is 13961997377. The next prime is 13961997437. The reversal of 13961997385 is 58379916931.

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

It is not a de Polignac number, because 13961997385 - 2³ = 13961997377 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 199457071 + ... + 199457140.

It is an arithmetic number, because the mean of its divisors is an integer number (2393485272).

Almost surely, 2^13961997385 is an apocalyptic number.

It is an amenable number.

13961997385 is a deficient number, since it is larger than the sum of its proper divisors (5185884791).

13961997385 is an equidigital number, since it uses as much as digits as its factorization.

13961997385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398914223.

The product of its digits is 11022480, while the sum is 61.

The spelling of 13961997385 in words is "thirteen billion, nine hundred sixty-one million, nine hundred ninety-seven thousand, three hundred eighty-five".