81267776350364 has 12 divisors (see below), whose sum is σ = 142845122309064. Its totient is φ = 40454884262064.

The previous prime is 81267776350363. The next prime is 81267776350447. The reversal of 81267776350364 is 46305367776218.

It is a happy number.

It is a hoax number, since the sum of its digits (65) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 81267776350364.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81267776350361) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44750977259 + ... + 44750979074.

It is an arithmetic number, because the mean of its divisors is an integer number (11903760192422).

Almost surely, 2^{81267776350364} is an apocalyptic number.

It is an amenable number.

81267776350364 is a deficient number, since it is larger than the sum of its proper divisors (61577345958700).

81267776350364 is a wasteful number, since it uses less digits than its factorization.

81267776350364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89501956564 (or 89501956562 counting only the distinct ones).

The product of its (nonzero) digits is 213373440, while the sum is 65.

The spelling of 81267776350364 in words is "eighty-one trillion, two hundred sixty-seven billion, seven hundred seventy-six million, three hundred fifty thousand, three hundred sixty-four".