78189753042 has 24 divisors (see below), whose sum is σ = 169646780160. Its totient is φ = 26026997400.

The previous prime is 78189753001. The next prime is 78189753073. The reversal of 78189753042 is 24035798187.

It is a happy number.

78189753042 is a `hidden beast` number, since 7 + 8 + 18 + 97 + 530 + 4 + 2 = 666.

It is a super-2 number, since 2×78189753042² (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 78189753042.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3007834 + ... + 3033717.

It is an arithmetic number, because the mean of its divisors is an integer number (7068615840).

Almost surely, 2^78189753042 is an apocalyptic number.

78189753042 is an abundant number, since it is smaller than the sum of its proper divisors (91457027118).

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

78189753042 is a wasteful number, since it uses less digits than its factorization.

78189753042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6042278 (or 6042275 counting only the distinct ones).

The product of its (nonzero) digits is 3386880, while the sum is 54.

The spelling of 78189753042 in words is "seventy-eight billion, one hundred eighty-nine million, seven hundred fifty-three thousand, forty-two".