81502035612764 has 36 divisors (see below), whose sum is σ = 154463235431400. Its totient is φ = 37611626045760.

The previous prime is 81502035612761. The next prime is 81502035612787. The reversal of 81502035612764 is 46721653020518.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81502035612761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2109539 + ... + 12940410.

It is an arithmetic number, because the mean of its divisors is an integer number (4290645428650).

Almost surely, 2^{81502035612764} is an apocalyptic number.

It is an amenable number.

81502035612764 is a deficient number, since it is larger than the sum of its proper divisors (72961199818636).

81502035612764 is a wasteful number, since it uses less digits than its factorization.

81502035612764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15057990 (or 15057975 counting only the distinct ones).

The product of its (nonzero) digits is 2419200, while the sum is 50.

The spelling of 81502035612764 in words is "eighty-one trillion, five hundred two billion, thirty-five million, six hundred twelve thousand, seven hundred sixty-four".