78295925889 has 20 divisors (see below), whose sum is σ = 119813282820. Its totient is φ = 50924177280.

The previous prime is 78295925881. The next prime is 78295925921. The reversal of 78295925889 is 98852959287.

78295925889 is a `hidden beast` number, since 7 + 8 + 29 + 592 + 5 + 8 + 8 + 9 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 34000409664 + 44295516225 = 184392^2 + 210465^2 .

It is not a de Polignac number, because 78295925889 - 2³ = 78295925881 is a prime.

It is a super-2 number, since 2×78295925889² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78295925881) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 11784684 + ... + 11791325.

It is an arithmetic number, because the mean of its divisors is an integer number (5990664141).

Almost surely, 2^78295925889 is an apocalyptic number.

It is an amenable number.

78295925889 is a deficient number, since it is larger than the sum of its proper divisors (41517356931).

78295925889 is a wasteful number, since it uses less digits than its factorization.

78295925889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23576062 (or 23576053 counting only the distinct ones).

The product of its digits is 261273600, while the sum is 72.

The spelling of 78295925889 in words is "seventy-eight billion, two hundred ninety-five million, nine hundred twenty-five thousand, eight hundred eighty-nine".