79782681965 has 8 divisors (see below), whose sum is σ = 109416249600. Its totient is φ = 54708124752.

The previous prime is 79782681889. The next prime is 79782682009. The reversal of 79782681965 is 56918628797.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79782681965 is a prime.

It is a super-2 number, since 2×79782681965² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 79782681895 and 79782681904.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1139752565 + ... + 1139752634.

It is an arithmetic number, because the mean of its divisors is an integer number (13677031200).

Almost surely, 2^79782681965 is an apocalyptic number.

It is an amenable number.

79782681965 is a deficient number, since it is larger than the sum of its proper divisors (29633567635).

79782681965 is a wasteful number, since it uses less digits than its factorization.

79782681965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2279505211.

The product of its digits is 91445760, while the sum is 68.

The spelling of 79782681965 in words is "seventy-nine billion, seven hundred eighty-two million, six hundred eighty-one thousand, nine hundred sixty-five".