5815391845 has 32 divisors (see below), whose sum is σ = 7511961600. Its totient is φ = 4308842304.

The previous prime is 5815391839. The next prime is 5815391863. The reversal of 5815391845 is 5481935185.

It is a cyclic number.

It is not a de Polignac number, because 5815391845 - 2¹³ = 5815383653 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 769254 + ... + 776776.

It is an arithmetic number, because the mean of its divisors is an integer number (234748800).

Almost surely, 2^5815391845 is an apocalyptic number.

It is an amenable number.

5815391845 is a deficient number, since it is larger than the sum of its proper divisors (1696569755).

5815391845 is a wasteful number, since it uses less digits than its factorization.

5815391845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7729.

The product of its digits is 864000, while the sum is 49.

The square root of 5815391845 is about 76258.7165181791. The cubic root of 5815391845 is about 1798.2897175562.

The spelling of 5815391845 in words is "five billion, eight hundred fifteen million, three hundred ninety-one thousand, eight hundred forty-five".