81402506482 has 16 divisors (see below), whose sum is σ = 133222559904. Its totient is φ = 36996012000.

The previous prime is 81402506473. The next prime is 81402506483. The reversal of 81402506482 is 28460520418.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (81402506483) 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, 91644 + ... + 413767.

It is an arithmetic number, because the mean of its divisors is an integer number (8326409994).

Almost surely, 2^81402506482 is an apocalyptic number.

81402506482 is a deficient number, since it is larger than the sum of its proper divisors (51820053422).

81402506482 is a wasteful number, since it uses less digits than its factorization.

81402506482 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 512745.

The product of its (nonzero) digits is 122880, while the sum is 40.

The spelling of 81402506482 in words is "eighty-one billion, four hundred two million, five hundred six thousand, four hundred eighty-two".