815140158 has 16 divisors (see below), whose sum is σ = 1863177600. Its totient is φ = 232897176.

The previous prime is 815140153. The next prime is 815140169. The reversal of 815140158 is 851041518.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (815140153) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9704008 + ... + 9704091.

It is an arithmetic number, because the mean of its divisors is an integer number (116448600).

Almost surely, 2^815140158 is an apocalyptic number.

815140158 is an abundant number, since it is smaller than the sum of its proper divisors (1048037442).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

815140158 is a wasteful number, since it uses less digits than its factorization.

815140158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19408111.

The product of its (nonzero) digits is 6400, while the sum is 33.

The square root of 815140158 is about 28550.6595020150. The cubic root of 815140158 is about 934.1374060951.

The spelling of 815140158 in words is "eight hundred fifteen million, one hundred forty thousand, one hundred fifty-eight".