78216342608438 has 8 divisors (see below), whose sum is σ = 117347037351960. Its totient is φ = 39100663491120.

The previous prime is 78216342608401. The next prime is 78216342608441. The reversal of 78216342608438 is 83480624361287.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×78216342608438² (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 in 3 ways as a sum of consecutive naturals, for example, 3753893528 + ... + 3753914363.

It is an arithmetic number, because the mean of its divisors is an integer number (14668379668995).

Almost surely, 2^{78216342608438} is an apocalyptic number.

78216342608438 is a deficient number, since it is larger than the sum of its proper divisors (39130694743522).

78216342608438 is a wasteful number, since it uses less digits than its factorization.

78216342608438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7507813102.

The product of its (nonzero) digits is 74317824, while the sum is 62.

The spelling of 78216342608438 in words is "seventy-eight trillion, two hundred sixteen billion, three hundred forty-two million, six hundred eight thousand, four hundred thirty-eight".