81407529883 has 16 divisors (see below), whose sum is σ = 85948395840. Its totient is φ = 76951074816.

The previous prime is 81407529877. The next prime is 81407529899. The reversal of 81407529883 is 38892570418.

It is a cyclic number.

It is not a de Polignac number, because 81407529883 - 2¹³ = 81407521691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81407529823) 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, 4118941 + ... + 4138657.

It is an arithmetic number, because the mean of its divisors is an integer number (5371774740).

Almost surely, 2^81407529883 is an apocalyptic number.

81407529883 is a deficient number, since it is larger than the sum of its proper divisors (4540865957).

81407529883 is a wasteful number, since it uses less digits than its factorization.

81407529883 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21846.

The product of its (nonzero) digits is 3870720, while the sum is 55.

The spelling of 81407529883 in words is "eighty-one billion, four hundred seven million, five hundred twenty-nine thousand, eight hundred eighty-three".