81502354794 has 64 divisors (see below), whose sum is σ = 189346959360. Its totient is φ = 22907404800.

The previous prime is 81502354777. The next prime is 81502354811. The reversal of 81502354794 is 49745320518.

It is an interprime number because it is at equal distance from previous prime (81502354777) and next prime (81502354811).

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, 590842 + ... + 715610.

It is an arithmetic number, because the mean of its divisors is an integer number (2958546240).

Almost surely, 2^81502354794 is an apocalyptic number.

81502354794 is an abundant number, since it is smaller than the sum of its proper divisors (107844604566).

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

81502354794 is a wasteful number, since it uses less digits than its factorization.

81502354794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125035.

The product of its (nonzero) digits is 1209600, while the sum is 48.

The spelling of 81502354794 in words is "eighty-one billion, five hundred two million, three hundred fifty-four thousand, seven hundred ninety-four".