81433410474 has 64 divisors (see below), whose sum is σ = 176393226240. Its totient is φ = 24914070720.

The previous prime is 81433410433. The next prime is 81433410497. The reversal of 81433410474 is 47401433418.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26446467 + ... + 26449545.

It is an arithmetic number, because the mean of its divisors is an integer number (2756144160).

Almost surely, 2^81433410474 is an apocalyptic number.

81433410474 is an abundant number, since it is smaller than the sum of its proper divisors (94959815766).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81433410474 is a wasteful number, since it uses less digits than its factorization.

81433410474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4915.

The product of its (nonzero) digits is 129024, while the sum is 39.

The spelling of 81433410474 in words is "eighty-one billion, four hundred thirty-three million, four hundred ten thousand, four hundred seventy-four".