4000815499 has 2 divisors, whose sum is σ = 4000815500. Its totient is φ = 4000815498.

The previous prime is 4000815463. The next prime is 4000815509. The reversal of 4000815499 is 9945180004.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4000815499 is a prime.

It is not a weakly prime, because it can be changed into another prime (4000815449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2000407749 + 2000407750.

It is an arithmetic number, because the mean of its divisors is an integer number (2000407750).

Almost surely, 2^4000815499 is an apocalyptic number.

4000815499 is a deficient number, since it is larger than the sum of its proper divisors (1).

4000815499 is an equidigital number, since it uses as much as digits as its factorization.

4000815499 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 4000815499 is about 63251.9999604756. Note that the first 4 decimals coincide. The cubic root of 4000815499 is about 1587.5089216354.

The spelling of 4000815499 in words is "four billion, eight hundred fifteen thousand, four hundred ninety-nine".