158397765 has 16 divisors (see below), whose sum is σ = 256646400. Its totient is φ = 83408832.

The previous prime is 158397731. The next prime is 158397779. The reversal of 158397765 is 567793851.

158397765 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 158397765 - 2¹¹ = 158395717 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65650 + ... + 68019.

It is an arithmetic number, because the mean of its divisors is an integer number (16040400).

Almost surely, 2^158397765 is an apocalyptic number.

158397765 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

158397765 is a deficient number, since it is larger than the sum of its proper divisors (98248635).

158397765 is a wasteful number, since it uses less digits than its factorization.

158397765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133756.

The product of its digits is 1587600, while the sum is 51.

The square root of 158397765 is about 12585.6173865250. The cubic root of 158397765 is about 541.0653009920.

The spelling of 158397765 in words is "one hundred fifty-eight million, three hundred ninety-seven thousand, seven hundred sixty-five".