15917748379 has 4 divisors (see below), whose sum is σ = 17142190576. Its totient is φ = 14693306184.

The previous prime is 15917748349. The next prime is 15917748421. The reversal of 15917748379 is 97384771951.

15917748379 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 15917748379 - 2¹¹ = 15917746331 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15917748349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 612221079 + ... + 612221104.

It is an arithmetic number, because the mean of its divisors is an integer number (4285547644).

Almost surely, 2^15917748379 is an apocalyptic number.

15917748379 is a deficient number, since it is larger than the sum of its proper divisors (1224442197).

15917748379 is a wasteful number, since it uses less digits than its factorization.

15917748379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1224442196.

The product of its digits is 13335840, while the sum is 61.

The spelling of 15917748379 in words is "fifteen billion, nine hundred seventeen million, seven hundred forty-eight thousand, three hundred seventy-nine".