78604167842 has 4 divisors (see below), whose sum is σ = 117906251766. Its totient is φ = 39302083920.

The previous prime is 78604167839. The next prime is 78604167847. The reversal of 78604167842 is 24876140687.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 58757275201 + 19846892641 = 242399^2 + 140879^2 .

It is not an unprimeable number, because it can be changed into a prime (78604167847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19651041959 + ... + 19651041962.

Almost surely, 2^78604167842 is an apocalyptic number.

78604167842 is a deficient number, since it is larger than the sum of its proper divisors (39302083924).

78604167842 is a wasteful number, since it uses less digits than its factorization.

78604167842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39302083923.

The product of its (nonzero) digits is 3612672, while the sum is 53.

The spelling of 78604167842 in words is "seventy-eight billion, six hundred four million, one hundred sixty-seven thousand, eight hundred forty-two".