81146713400 has 48 divisors (see below), whose sum is σ = 189209976840. Its totient is φ = 32365116800.

The previous prime is 81146713363. The next prime is 81146713421. The reversal of 81146713400 is 431764118.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 515231 + ... + 654030.

Almost surely, 2^81146713400 is an apocalyptic number.

It is an amenable number.

81146713400 is an abundant number, since it is smaller than the sum of its proper divisors (108063263440).

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

81146713400 is a wasteful number, since it uses less digits than its factorization.

81146713400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1169624 (or 1169615 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 35.

The spelling of 81146713400 in words is "eighty-one billion, one hundred forty-six million, seven hundred thirteen thousand, four hundred".