2158762678 has 8 divisors (see below), whose sum is σ = 3240291600. Its totient is φ = 1078665480.

The previous prime is 2158762673. The next prime is 2158762679. The reversal of 2158762678 is 8762678512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2158762673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 354153 + ... + 360196.

It is an arithmetic number, because the mean of its divisors is an integer number (405036450).

Almost surely, 2^2158762678 is an apocalyptic number.

2158762678 is a deficient number, since it is larger than the sum of its proper divisors (1081528922).

2158762678 is a wasteful number, since it uses less digits than its factorization.

2158762678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 715862.

The product of its digits is 2257920, while the sum is 52.

The square root of 2158762678 is about 46462.4867823495. The cubic root of 2158762678 is about 1292.4139400739.

The spelling of 2158762678 in words is "two billion, one hundred fifty-eight million, seven hundred sixty-two thousand, six hundred seventy-eight".