81475751103 has 16 divisors (see below), whose sum is σ = 113374619136. Its totient is φ = 51947735840.

The previous prime is 81475751041. The next prime is 81475751107. The reversal of 81475751103 is 30115757418.

It is a cyclic number.

It is not a de Polignac number, because 81475751103 - 2⁶ = 81475751039 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81475751107) 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, 391918 + ... + 562628.

It is an arithmetic number, because the mean of its divisors is an integer number (7085913696).

Almost surely, 2^81475751103 is an apocalyptic number.

81475751103 is a deficient number, since it is larger than the sum of its proper divisors (31898868033).

81475751103 is a wasteful number, since it uses less digits than its factorization.

81475751103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177654.

The product of its (nonzero) digits is 117600, while the sum is 42.

The spelling of 81475751103 in words is "eighty-one billion, four hundred seventy-five million, seven hundred fifty-one thousand, one hundred three".