78378616005 has 8 divisors (see below), whose sum is σ = 125405785632. Its totient is φ = 41801928528.

The previous prime is 78378615989. The next prime is 78378616031. The reversal of 78378616005 is 50061687387.

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

It is not a de Polignac number, because 78378616005 - 2⁴ = 78378615989 is a prime.

It is a super-2 number, since 2×78378616005² (a number of 23 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 7 ways as a sum of consecutive naturals, for example, 2612620519 + ... + 2612620548.

It is an arithmetic number, because the mean of its divisors is an integer number (15675723204).

Almost surely, 2^78378616005 is an apocalyptic number.

It is an amenable number.

78378616005 is a deficient number, since it is larger than the sum of its proper divisors (47027169627).

78378616005 is a wasteful number, since it uses less digits than its factorization.

78378616005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5225241075.

The product of its (nonzero) digits is 1693440, while the sum is 51.

The spelling of 78378616005 in words is "seventy-eight billion, three hundred seventy-eight million, six hundred sixteen thousand, five".