5115781915 has 8 divisors (see below), whose sum is σ = 6152200128. Its totient is φ = 4083784320.

The previous prime is 5115781889. The next prime is 5115781927. The reversal of 5115781915 is 5191875115.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-5115781915 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1102606 + ... + 1107235.

It is an arithmetic number, because the mean of its divisors is an integer number (769025016).

Almost surely, 2^5115781915 is an apocalyptic number.

5115781915 is a deficient number, since it is larger than the sum of its proper divisors (1036418213).

5115781915 is a wasteful number, since it uses less digits than its factorization.

5115781915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2210309.

The product of its digits is 63000, while the sum is 43.

The square root of 5115781915 is about 71524.6944418499. The cubic root of 5115781915 is about 1723.0743100786.

The spelling of 5115781915 in words is "five billion, one hundred fifteen million, seven hundred eighty-one thousand, nine hundred fifteen".