8371857613 has 48 divisors (see below), whose sum is σ = 10303527936. Its totient is φ = 6773518080.

The previous prime is 8371857601. The next prime is 8371857629. The reversal of 8371857613 is 3167581738.

It is a de Polignac number, because none of the positive numbers 2^k-8371857613 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8371857643) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 11420995 + ... + 11421727.

It is an arithmetic number, because the mean of its divisors is an integer number (214656832).

Almost surely, 2^8371857613 is an apocalyptic number.

It is an amenable number.

8371857613 is a deficient number, since it is larger than the sum of its proper divisors (1931670323).

8371857613 is a wasteful number, since it uses less digits than its factorization.

8371857613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 954 (or 947 counting only the distinct ones).

The product of its digits is 846720, while the sum is 49.

The square root of 8371857613 is about 91497.8557836193. The cubic root of 8371857613 is about 2030.5200292766.

The spelling of 8371857613 in words is "eight billion, three hundred seventy-one million, eight hundred fifty-seven thousand, six hundred thirteen".