79382585281 has 4 divisors (see below), whose sum is σ = 79383542212. Its totient is φ = 79381628352.

The previous prime is 79382585279. The next prime is 79382585287. The reversal of 79382585281 is 18258528397.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 53907552400 + 25475032881 = 232180^2 + 159609^2 .

It is a cyclic number.

It is not a de Polignac number, because 79382585281 - 2¹ = 79382585279 is a prime.

It is a super-2 number, since 2×79382585281² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79382585287) 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, 340836 + ... + 524341.

It is an arithmetic number, because the mean of its divisors is an integer number (19845885553).

Almost surely, 2^79382585281 is an apocalyptic number.

It is an amenable number.

79382585281 is a deficient number, since it is larger than the sum of its proper divisors (956931).

79382585281 is an equidigital number, since it uses as much as digits as its factorization.

79382585281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 956930.

The product of its digits is 9676800, while the sum is 58.

The spelling of 79382585281 in words is "seventy-nine billion, three hundred eighty-two million, five hundred eighty-five thousand, two hundred eighty-one".