158268761 has 4 divisors (see below), whose sum is σ = 180878592. Its totient is φ = 135658932.

The previous prime is 158268751. The next prime is 158268769. The reversal of 158268761 is 167862851.

It is a happy number.

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 an emirpimes, since its reverse is a distinct semiprime: 167862851 = 13 ⋅12912527.

It is a cyclic number.

It is not a de Polignac number, because 158268761 - 2¹⁴ = 158252377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (158268769) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11304905 + ... + 11304918.

It is an arithmetic number, because the mean of its divisors is an integer number (45219648).

Almost surely, 2^158268761 is an apocalyptic number.

It is an amenable number.

158268761 is a deficient number, since it is larger than the sum of its proper divisors (22609831).

158268761 is an equidigital number, since it uses as much as digits as its factorization.

158268761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22609830.

The product of its digits is 161280, while the sum is 44.

The square root of 158268761 is about 12580.4912861144. The cubic root of 158268761 is about 540.9183743699.

The spelling of 158268761 in words is "one hundred fifty-eight million, two hundred sixty-eight thousand, seven hundred sixty-one".