81080426 has 16 divisors (see below), whose sum is σ = 139110720. Its totient is φ = 34719840.

The previous prime is 81080423. The next prime is 81080449. The reversal of 81080426 is 62408018.

It is not an unprimeable number, because it can be changed into a prime (81080423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30665 + ... + 33203.

It is an arithmetic number, because the mean of its divisors is an integer number (8694420).

Almost surely, 2^81080426 is an apocalyptic number.

81080426 is a deficient number, since it is larger than the sum of its proper divisors (58030294).

81080426 is a wasteful number, since it uses less digits than its factorization.

81080426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4829.

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 81080426 is about 9004.4670025493. The cubic root of 81080426 is about 432.8180266408.

The spelling of 81080426 in words is "eighty-one million, eighty thousand, four hundred twenty-six".