78185649740 has 48 divisors (see below), whose sum is σ = 181274284800. Its totient is φ = 28088594880.

The previous prime is 78185649697. The next prime is 78185649757. The reversal of 78185649740 is 4794658187.

It is a super-2 number, since 2×78185649740² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78185649740.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2122640 + ... + 2159159.

It is an arithmetic number, because the mean of its divisors is an integer number (3776547600).

Almost surely, 2^78185649740 is an apocalyptic number.

It is an amenable number.

78185649740 is an abundant number, since it is smaller than the sum of its proper divisors (103088635060).

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

78185649740 is a wasteful number, since it uses less digits than its factorization.

78185649740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4281902 (or 4281900 counting only the distinct ones).

The product of its (nonzero) digits is 13547520, while the sum is 59.

The spelling of 78185649740 in words is "seventy-eight billion, one hundred eighty-five million, six hundred forty-nine thousand, seven hundred forty".