78295925917 has 8 divisors (see below), whose sum is σ = 90438075072. Its totient is φ = 66991166400.

The previous prime is 78295925881. The next prime is 78295925921. The reversal of 78295925917 is 71952959287.

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 not a de Polignac number, because 78295925917 - 2¹⁹ = 78295401629 is a prime.

It is a super-2 number, since 2×78295925917² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78295925927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 209347209 + ... + 209347582.

It is an arithmetic number, because the mean of its divisors is an integer number (11304759384).

Almost surely, 2^78295925917 is an apocalyptic number.

It is an amenable number.

78295925917 is a deficient number, since it is larger than the sum of its proper divisors (12142149155).

78295925917 is a wasteful number, since it uses less digits than its factorization.

78295925917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418694819.

The product of its digits is 28576800, while the sum is 64.

The spelling of 78295925917 in words is "seventy-eight billion, two hundred ninety-five million, nine hundred twenty-five thousand, nine hundred seventeen".