78838874174894 has 4 divisors (see below), whose sum is σ = 118258311262344. Its totient is φ = 39419437087446.

The previous prime is 78838874174887. The next prime is 78838874174927. The reversal of 78838874174894 is 49847147883887.

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

It is a super-2 number, since 2×78838874174894² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19709718543722 + ... + 19709718543725.

It is an arithmetic number, because the mean of its divisors is an integer number (29564577815586).

Almost surely, 2^{78838874174894} is an apocalyptic number.

78838874174894 is a deficient number, since it is larger than the sum of its proper divisors (39419437087450).

78838874174894 is a wasteful number, since it uses less digits than its factorization.

78838874174894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39419437087449.

The product of its digits is 19421724672, while the sum is 86.

The spelling of 78838874174894 in words is "seventy-eight trillion, eight hundred thirty-eight billion, eight hundred seventy-four million, one hundred seventy-four thousand, eight hundred ninety-four".