78181135180224 has 56 divisors (see below), whose sum is σ = 206982496260240. Its totient is φ = 26044221825024.

The previous prime is 78181135180199. The next prime is 78181135180229. The reversal of 78181135180224 is 42208153118187.

It is a super-2 number, since 2×78181135180224² (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 (78181135180229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125912689 + ... + 126532080.

Almost surely, 2^{78181135180224} is an apocalyptic number.

It is an amenable number.

78181135180224 is an abundant number, since it is smaller than the sum of its proper divisors (128801361080016).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78181135180224 is a wasteful number, since it uses less digits than its factorization.

78181135180224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252446397 (or 252446387 counting only the distinct ones).

The product of its (nonzero) digits is 860160, while the sum is 51.

The spelling of 78181135180224 in words is "seventy-eight trillion, one hundred eighty-one billion, one hundred thirty-five million, one hundred eighty thousand, two hundred twenty-four".