78295925899 has 4 divisors (see below), whose sum is σ = 80821600960. Its totient is φ = 75770250840.

The previous prime is 78295925881. The next prime is 78295925921. The reversal of 78295925899 is 99852959287.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99852959287 = 2851 ⋅35023837.

It is a de Polignac number, because none of the positive numbers 2^k-78295925899 is a prime.

It is a super-2 number, since 2×78295925899² (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 (78295925999) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1262837484 + ... + 1262837545.

It is an arithmetic number, because the mean of its divisors is an integer number (20205400240).

Almost surely, 2^78295925899 is an apocalyptic number.

78295925899 is a deficient number, since it is larger than the sum of its proper divisors (2525675061).

78295925899 is a wasteful number, since it uses less digits than its factorization.

78295925899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2525675060.

The product of its digits is 293932800, while the sum is 73.

The spelling of 78295925899 in words is "seventy-eight billion, two hundred ninety-five million, nine hundred twenty-five thousand, eight hundred ninety-nine".