2158815567 has 16 divisors (see below), whose sum is σ = 3052540512. Its totient is φ = 1352417280.

The previous prime is 2158815551. The next prime is 2158815577. The reversal of 2158815567 is 7655188512.

It is not a de Polignac number, because 2158815567 - 2⁴ = 2158815551 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2158815577) 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, 328 + ... + 65709.

It is an arithmetic number, because the mean of its divisors is an integer number (190783782).

Almost surely, 2^2158815567 is an apocalyptic number.

2158815567 is a deficient number, since it is larger than the sum of its proper divisors (893724945).

2158815567 is a wasteful number, since it uses less digits than its factorization.

2158815567 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66698.

The product of its digits is 672000, while the sum is 48.

The square root of 2158815567 is about 46463.0559369484. The cubic root of 2158815567 is about 1292.4244945647.

The spelling of 2158815567 in words is "two billion, one hundred fifty-eight million, eight hundred fifteen thousand, five hundred sixty-seven".