15855474347 has 4 divisors (see below), whose sum is σ = 15857497656. Its totient is φ = 15853451040.

The previous prime is 15855474343. The next prime is 15855474359. The reversal of 15855474347 is 74347455851.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74347455851 = 7411 ⋅10032041.

It is a cyclic number.

It is not a de Polignac number, because 15855474347 - 2² = 15855474343 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15855474343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 999854 + ... + 1015587.

It is an arithmetic number, because the mean of its divisors is an integer number (3964374414).

Almost surely, 2^15855474347 is an apocalyptic number.

15855474347 is a deficient number, since it is larger than the sum of its proper divisors (2023309).

15855474347 is an equidigital number, since it uses as much as digits as its factorization.

15855474347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2023308.

The product of its digits is 9408000, while the sum is 53.

The spelling of 15855474347 in words is "fifteen billion, eight hundred fifty-five million, four hundred seventy-four thousand, three hundred forty-seven".