8157505515 has 16 divisors (see below), whose sum is σ = 13186567968. Its totient is φ = 4305816576.

The previous prime is 8157505513. The next prime is 8157505561. The reversal of 8157505515 is 5155057518.

It is not a de Polignac number, because 8157505515 - 2¹ = 8157505513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8157505513) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2801812 + ... + 2804721.

It is an arithmetic number, because the mean of its divisors is an integer number (824160498).

Almost surely, 2^8157505515 is an apocalyptic number.

8157505515 is a deficient number, since it is larger than the sum of its proper divisors (5029062453).

8157505515 is a wasteful number, since it uses less digits than its factorization.

8157505515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5606638.

The product of its (nonzero) digits is 175000, while the sum is 42.

The square root of 8157505515 is about 90318.9100631756. The cubic root of 8157505515 is about 2013.0402507247.

The spelling of 8157505515 in words is "eight billion, one hundred fifty-seven million, five hundred five thousand, five hundred fifteen".