158315645 has 18 divisors (see below), whose sum is σ = 202422906. Its totient is φ = 118842240.

The previous prime is 158315639. The next prime is 158315659. The reversal of 158315645 is 546513851.

It can be written as a sum of positive squares in 3 ways, for example, as 53027524 + 105288121 = 7282^2 + 10261^2 .

It is not a de Polignac number, because 158315645 - 2¹⁰ = 158314621 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 158315599 and 158315608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 478130 + ... + 478460.

It is an arithmetic number, because the mean of its divisors is an integer number (11245717).

Almost surely, 2^158315645 is an apocalyptic number.

It is an amenable number.

158315645 is a deficient number, since it is larger than the sum of its proper divisors (44107261).

158315645 is an frugal number, since it uses more digits than its factorization.

158315645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 701 (or 353 counting only the distinct ones).

The product of its digits is 72000, while the sum is 38.

The square root of 158315645 is about 12582.3545093913. The cubic root of 158315645 is about 540.9717812312.

Multiplying 158315645 by its product of digits (72000), we get a square (11398726440000 = 3376200²).

The spelling of 158315645 in words is "one hundred fifty-eight million, three hundred fifteen thousand, six hundred forty-five".