8371556145 has 20 divisors (see below), whose sum is σ = 15006790260. Its totient is φ = 4464829728.

The previous prime is 8371556099. The next prime is 8371556159. The reversal of 8371556145 is 5416551738.

8371556145 is a `hidden beast` number, since 8 + 37 + 15 + 561 + 45 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 2337529104 + 6034027041 = 48348^2 + 77679^2 .

It is not a de Polignac number, because 8371556145 - 2¹⁰ = 8371555121 is a prime.

It is a super-2 number, since 2×8371556145² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 8371556145.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 10334850 + ... + 10335659.

It is an arithmetic number, because the mean of its divisors is an integer number (750339513).

Almost surely, 2^8371556145 is an apocalyptic number.

It is an amenable number.

8371556145 is a deficient number, since it is larger than the sum of its proper divisors (6635234115).

8371556145 is a wasteful number, since it uses less digits than its factorization.

8371556145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20670526 (or 20670517 counting only the distinct ones).

The product of its digits is 504000, while the sum is 45.

The square root of 8371556145 is about 91496.2083640628. The cubic root of 8371556145 is about 2030.4956561849.

The spelling of 8371556145 in words is "eight billion, three hundred seventy-one million, five hundred fifty-six thousand, one hundred forty-five".