5145940809 has 24 divisors (see below), whose sum is σ = 7523448192. Its totient is φ = 3389047200.

The previous prime is 5145940781. The next prime is 5145940831. The reversal of 5145940809 is 9080495415.

5145940809 is a `hidden beast` number, since 51 + 4 + 594 + 0 + 8 + 0 + 9 = 666.

It is not a de Polignac number, because 5145940809 - 2⁵ = 5145940777 is a prime.

It is not an unprimeable number, because it can be changed into a prime (5145940859) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 414754 + ... + 426980.

It is an arithmetic number, because the mean of its divisors is an integer number (313477008).

Almost surely, 2^5145940809 is an apocalyptic number.

It is an amenable number.

5145940809 is a deficient number, since it is larger than the sum of its proper divisors (2377507383).

5145940809 is a wasteful number, since it uses less digits than its factorization.

5145940809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12797 (or 12794 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 45.

The square root of 5145940809 is about 71735.2131731690. The cubic root of 5145940809 is about 1726.4536716733.

The spelling of 5145940809 in words is "five billion, one hundred forty-five million, nine hundred forty thousand, eight hundred nine".