15949712947 has 4 divisors (see below), whose sum is σ = 18228243376. Its totient is φ = 13671182520.

The previous prime is 15949712879. The next prime is 15949712959. The reversal of 15949712947 is 74921794951.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 15949712947 - 2⁷ = 15949712819 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 15949712891 and 15949712900.

It is not an unprimeable number, because it can be changed into a prime (15949712147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1139265204 + ... + 1139265217.

It is an arithmetic number, because the mean of its divisors is an integer number (4557060844).

Almost surely, 2^15949712947 is an apocalyptic number.

15949712947 is a deficient number, since it is larger than the sum of its proper divisors (2278530429).

15949712947 is an equidigital number, since it uses as much as digits as its factorization.

15949712947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2278530428.

The product of its digits is 5715360, while the sum is 58.

The spelling of 15949712947 in words is "fifteen billion, nine hundred forty-nine million, seven hundred twelve thousand, nine hundred forty-seven".