79855145 has 8 divisors (see below), whose sum is σ = 96775560. Its totient is φ = 63251200.

The previous prime is 79855141. The next prime is 79855147. The reversal of 79855145 is 54155897.

It can be written as a sum of positive squares in 4 ways, for example, as 19963024 + 59892121 = 4468^2 + 7739^2 .

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

It is not a de Polignac number, because 79855145 - 2² = 79855141 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 79855096 and 79855105.

It is not an unprimeable number, because it can be changed into a prime (79855141) 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 7 ways as a sum of consecutive naturals, for example, 78560 + ... + 79569.

It is an arithmetic number, because the mean of its divisors is an integer number (12096945).

Almost surely, 2^79855145 is an apocalyptic number.

It is an amenable number.

79855145 is a deficient number, since it is larger than the sum of its proper divisors (16920415).

79855145 is a wasteful number, since it uses less digits than its factorization.

79855145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158235.

The product of its digits is 252000, while the sum is 44.

The square root of 79855145 is about 8936.1706004306. The cubic root of 79855145 is about 430.6267136840.

The spelling of 79855145 in words is "seventy-nine million, eight hundred fifty-five thousand, one hundred forty-five".