78898425993 has 24 divisors (see below), whose sum is σ = 114296165568. Its totient is φ = 52446003552.

The previous prime is 78898425971. The next prime is 78898425997. The reversal of 78898425993 is 39952489887.

It is not a de Polignac number, because 78898425993 - 2¹⁷ = 78898294921 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78898425997) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6075255 + ... + 6088227.

It is an arithmetic number, because the mean of its divisors is an integer number (4762340232).

Almost surely, 2^78898425993 is an apocalyptic number.

It is an amenable number.

78898425993 is a deficient number, since it is larger than the sum of its proper divisors (35397739575).

78898425993 is a wasteful number, since it uses less digits than its factorization.

78898425993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14893 (or 14890 counting only the distinct ones).

The product of its digits is 313528320, while the sum is 72.

The spelling of 78898425993 in words is "seventy-eight billion, eight hundred ninety-eight million, four hundred twenty-five thousand, nine hundred ninety-three".