81264345750352 has 20 divisors (see below), whose sum is σ = 157526889017760. Its totient is φ = 40612245358688.

The previous prime is 81264345750331. The next prime is 81264345750397. The reversal of 81264345750352 is 25305754346218.

It is a junction number, because it is equal to n+sod(n) for n = 81264345750293 and 81264345750302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1245436138 + ... + 1245501385.

It is an arithmetic number, because the mean of its divisors is an integer number (7876344450888).

Almost surely, 2^{81264345750352} is an apocalyptic number.

It is an amenable number.

81264345750352 is a deficient number, since it is larger than the sum of its proper divisors (76262543267408).

81264345750352 is a wasteful number, since it uses less digits than its factorization.

81264345750352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2490939570 (or 2490939564 counting only the distinct ones).

The product of its (nonzero) digits is 24192000, while the sum is 55.

The spelling of 81264345750352 in words is "eighty-one trillion, two hundred sixty-four billion, three hundred forty-five million, seven hundred fifty thousand, three hundred fifty-two".