78418813788351 has 12 divisors (see below), whose sum is σ = 113279421718320. Its totient is φ = 52275608360640.

The previous prime is 78418813788347. The next prime is 78418813788407. The reversal of 78418813788351 is 15388731881487.

78418813788351 is a `hidden beast` number, since 7 + 8 + 4 + 188 + 13 + 7 + 88 + 351 = 666.

It is not a de Polignac number, because 78418813788351 - 2² = 78418813788347 is a prime.

It is a super-2 number, since 2×78418813788351² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78418813788351.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78418813788751) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 299931370 + ... + 300192711.

It is an arithmetic number, because the mean of its divisors is an integer number (9439951809860).

Almost surely, 2^{78418813788351} is an apocalyptic number.

78418813788351 is a deficient number, since it is larger than the sum of its proper divisors (34860607929969).

78418813788351 is a wasteful number, since it uses less digits than its factorization.

78418813788351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 600138606 (or 600138603 counting only the distinct ones).

The product of its digits is 289013760, while the sum is 72.

The spelling of 78418813788351 in words is "seventy-eight trillion, four hundred eighteen billion, eight hundred thirteen million, seven hundred eighty-eight thousand, three hundred fifty-one".