78195181458 has 16 divisors (see below), whose sum is σ = 156426557760. Its totient is φ = 26059028016.

The previous prime is 78195181453. The next prime is 78195181529. The reversal of 78195181458 is 85418159187.

It is a happy number.

It is a super-2 number, since 2×78195181458² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78195181398 and 78195181407.

It is not an unprimeable number, because it can be changed into a prime (78195181451) 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, 1479993 + ... + 1531916.

It is an arithmetic number, because the mean of its divisors is an integer number (9776659860).

Almost surely, 2^78195181458 is an apocalyptic number.

78195181458 is an abundant number, since it is smaller than the sum of its proper divisors (78231376302).

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

78195181458 is a wasteful number, since it uses less digits than its factorization.

78195181458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3016241.

The product of its digits is 3225600, while the sum is 57.

The spelling of 78195181458 in words is "seventy-eight billion, one hundred ninety-five million, one hundred eighty-one thousand, four hundred fifty-eight".