81713377903 has 16 divisors (see below), whose sum is σ = 86148541440. Its totient is φ = 77353204896.

The previous prime is 81713377883. The next prime is 81713377931. The reversal of 81713377903 is 30977331718.

It is a cyclic number.

It is not a de Polignac number, because 81713377903 - 2⁵ = 81713377871 is a prime.

It is a super-2 number, since 2×81713377903² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81713377943) 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, 2541001 + ... + 2572957.

It is an arithmetic number, because the mean of its divisors is an integer number (5384283840).

Almost surely, 2^81713377903 is an apocalyptic number.

81713377903 is a deficient number, since it is larger than the sum of its proper divisors (4435163537).

81713377903 is a wasteful number, since it uses less digits than its factorization.

81713377903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33126.

The product of its (nonzero) digits is 666792, while the sum is 49.

The spelling of 81713377903 in words is "eighty-one billion, seven hundred thirteen million, three hundred seventy-seven thousand, nine hundred three".