78680820619 has 8 divisors (see below), whose sum is σ = 79619059520. Its totient is φ = 77746516416.

The previous prime is 78680820613. The next prime is 78680820641. The reversal of 78680820619 is 91602808687.

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-78680820619 is a prime.

It is a super-2 number, since 2×78680820619² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78680820619.

It is not an unprimeable number, because it can be changed into a prime (78680820613) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 943434 + ... + 1023439.

It is an arithmetic number, because the mean of its divisors is an integer number (9952382440).

Almost surely, 2^78680820619 is an apocalyptic number.

78680820619 is a deficient number, since it is larger than the sum of its proper divisors (938238901).

78680820619 is a wasteful number, since it uses less digits than its factorization.

78680820619 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1967349.

The product of its (nonzero) digits is 2322432, while the sum is 55.

The spelling of 78680820619 in words is "seventy-eight billion, six hundred eighty million, eight hundred twenty thousand, six hundred nineteen".