78183949848 has 32 divisors (see below), whose sum is σ = 195469954800. Its totient is φ = 26059972608.

The previous prime is 78183949799. The next prime is 78183949849. The reversal of 78183949848 is 84894938187.

It is a super-2 number, since 2×78183949848² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78183949849) 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, 464040 + ... + 609672.

Almost surely, 2^78183949848 is an apocalyptic number.

It is an amenable number.

78183949848 is an abundant number, since it is smaller than the sum of its proper divisors (117286004952).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78183949848 is a wasteful number, since it uses less digits than its factorization.

78183949848 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168011 (or 168007 counting only the distinct ones).

The product of its digits is 111476736, while the sum is 69.

The spelling of 78183949848 in words is "seventy-eight billion, one hundred eighty-three million, nine hundred forty-nine thousand, eight hundred forty-eight".