78378803294687 has 16 divisors (see below), whose sum is σ = 93981141202944. Its totient is φ = 63948861180000.

The previous prime is 78378803294683. The next prime is 78378803294707. The reversal of 78378803294687 is 78649230887387.

It is a cyclic number.

It is not a de Polignac number, because 78378803294687 - 2² = 78378803294683 is a prime.

It is a super-2 number, since 2×78378803294687² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78378803294683) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2960582189 + ... + 2960608662.

It is an arithmetic number, because the mean of its divisors is an integer number (5873821325184).

Almost surely, 2^{78378803294687} is an apocalyptic number.

78378803294687 is a deficient number, since it is larger than the sum of its proper divisors (15602337908257).

78378803294687 is a wasteful number, since it uses less digits than its factorization.

78378803294687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5921190950.

The product of its (nonzero) digits is 5462360064, while the sum is 80.

The spelling of 78378803294687 in words is "seventy-eight trillion, three hundred seventy-eight billion, eight hundred three million, two hundred ninety-four thousand, six hundred eighty-seven".