268158061 has 4 divisors (see below), whose sum is σ = 268192800. Its totient is φ = 268123324.

The previous prime is 268158047. The next prime is 268158067. The reversal of 268158061 is 160851862.

268158061 is a nontrivial binomial coefficient, being equal to C(23159, 2).

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 268158061 - 2¹¹ = 268156013 is a prime.

It is a super-3 number, since 3×268158061³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 268158061.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (268158067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1 + ... + 23158.

It is an arithmetic number, because the mean of its divisors is an integer number (67048200).

Almost surely, 2^268158061 is an apocalyptic number.

268158061 is the 23158-th triangular number.

268158061 is the 7720-th centered nonagonal number.

It is an amenable number.

268158061 is a deficient number, since it is larger than the sum of its proper divisors (34739).

268158061 is a wasteful number, since it uses less digits than its factorization.

268158061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34738.

The product of its (nonzero) digits is 23040, while the sum is 37.

The square root of 268158061 is about 16375.5323882920. The cubic root of 268158061 is about 644.8572975170.

The spelling of 268158061 in words is "two hundred sixty-eight million, one hundred fifty-eight thousand, sixty-one".