78181135541628 has 96 divisors (see below), whose sum is σ = 209198241778176. Its totient is φ = 22260870807552.

The previous prime is 78181135541603. The next prime is 78181135541633. The reversal of 78181135541628 is 82614553118187.

It is a super-2 number, since 2×78181135541628² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 112261500 + ... + 112955772.

It is an arithmetic number, because the mean of its divisors is an integer number (2179148351856).

Almost surely, 2^{78181135541628} is an apocalyptic number.

It is an amenable number.

78181135541628 is an abundant number, since it is smaller than the sum of its proper divisors (131017106236548).

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

78181135541628 is a wasteful number, since it uses less digits than its factorization.

78181135541628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 698883 (or 698881 counting only the distinct ones).

The product of its digits is 12902400, while the sum is 60.

The spelling of 78181135541628 in words is "seventy-eight trillion, one hundred eighty-one billion, one hundred thirty-five million, five hundred forty-one thousand, six hundred twenty-eight".