2158968771387 has 24 divisors (see below), whose sum is σ = 3153852954720. Its totient is φ = 1423003697280.

The previous prime is 2158968771341. The next prime is 2158968771409. The reversal of 2158968771387 is 7831778698512.

It is a happy number.

2158968771387 is a `hidden beast` number, since 2 + 1 + 589 + 6 + 8 + 7 + 7 + 1 + 38 + 7 = 666.

It is not a de Polignac number, because 2158968771387 - 2⁷ = 2158968771259 is a prime.

It is a super-2 number, since 2×2158968771387² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2158968771307) 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, 8575578 + ... + 8823744.

It is an arithmetic number, because the mean of its divisors is an integer number (131410539780).

Almost surely, 2^{2158968771387} is an apocalyptic number.

2158968771387 is a deficient number, since it is larger than the sum of its proper divisors (994884183333).

2158968771387 is a wasteful number, since it uses less digits than its factorization.

2158968771387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259123 (or 259120 counting only the distinct ones).

The product of its digits is 284497920, while the sum is 72.

The spelling of 2158968771387 in words is "two trillion, one hundred fifty-eight billion, nine hundred sixty-eight million, seven hundred seventy-one thousand, three hundred eighty-seven".