81149186703 has 16 divisors (see below), whose sum is σ = 116530144640. Its totient is φ = 49934431584.

The previous prime is 81149186683. The next prime is 81149186719. The reversal of 81149186703 is 30768194118.

It is not a de Polignac number, because 81149186703 - 2¹² = 81149182607 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81149186773) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 552900 + ... + 684102.

It is an arithmetic number, because the mean of its divisors is an integer number (7283134040).

Almost surely, 2^81149186703 is an apocalyptic number.

81149186703 is a deficient number, since it is larger than the sum of its proper divisors (35380957937).

81149186703 is a wasteful number, since it uses less digits than its factorization.

81149186703 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147078.

The product of its (nonzero) digits is 290304, while the sum is 48.

The spelling of 81149186703 in words is "eighty-one billion, one hundred forty-nine million, one hundred eighty-six thousand, seven hundred three".