8515387949 has 24 divisors (see below), whose sum is σ = 8981921088. Its totient is φ = 8067892160.

The previous prime is 8515387939. The next prime is 8515388017. The reversal of 8515387949 is 9497835158.

It is not a de Polignac number, because 8515387949 - 2⁸ = 8515387693 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8515387939) 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, 15124742 + ... + 15125304.

It is an arithmetic number, because the mean of its divisors is an integer number (374246712).

Almost surely, 2^8515387949 is an apocalyptic number.

It is an amenable number.

8515387949 is a deficient number, since it is larger than the sum of its proper divisors (466533139).

8515387949 is a wasteful number, since it uses less digits than its factorization.

8515387949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 865 (or 818 counting only the distinct ones).

The product of its digits is 10886400, while the sum is 59.

The square root of 8515387949 is about 92278.8597079526. The cubic root of 8515387949 is about 2042.0583438413.

The spelling of 8515387949 in words is "eight billion, five hundred fifteen million, three hundred eighty-seven thousand, nine hundred forty-nine".