79442647249 has 16 divisors (see below), whose sum is σ = 96400108800. Its totient is φ = 63909633024.

The previous prime is 79442647237. The next prime is 79442647253. The reversal of 79442647249 is 94274624497.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 79442647249 - 2²¹ = 79440550097 is a prime.

It is a super-2 number, since 2×79442647249² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 79442647193 and 79442647202.

It is not an unprimeable number, because it can be changed into a prime (79442647279) 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 15 ways as a sum of consecutive naturals, for example, 887064 + ... + 972505.

It is an arithmetic number, because the mean of its divisors is an integer number (6025006800).

Almost surely, 2^79442647249 is an apocalyptic number.

It is an amenable number.

79442647249 is a deficient number, since it is larger than the sum of its proper divisors (16957461551).

79442647249 is a wasteful number, since it uses less digits than its factorization.

79442647249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1859952.

The product of its digits is 24385536, while the sum is 58.

The spelling of 79442647249 in words is "seventy-nine billion, four hundred forty-two million, six hundred forty-seven thousand, two hundred forty-nine".