158996778 has 8 divisors (see below), whose sum is σ = 317993568. Its totient is φ = 52998924.

The previous prime is 158996777. The next prime is 158996779. The reversal of 158996778 is 877699851.

158996778 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (158996777) and next prime (158996779).

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

158996778 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (158996771) 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, 13249726 + ... + 13249737.

It is an arithmetic number, because the mean of its divisors is an integer number (39749196).

Almost surely, 2^158996778 is an apocalyptic number.

158996778 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

158996778 is a wasteful number, since it uses less digits than its factorization.

158996778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26499468.

The product of its digits is 7620480, while the sum is 60.

The square root of 158996778 is about 12609.3924516608. The cubic root of 158996778 is about 541.7464921041.

The spelling of 158996778 in words is "one hundred fifty-eight million, nine hundred ninety-six thousand, seven hundred seventy-eight".