81323444962 has 8 divisors (see below), whose sum is σ = 123656197356. Its totient is φ = 40104712512.

The previous prime is 81323444899. The next prime is 81323444977. The reversal of 81323444962 is 26944432318.

It can be written as a sum of positive squares in 2 ways, for example, as 81315655281 + 7789681 = 285159^2 + 2791^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×81323444962² (a number of 23 digits) contains 22 as substring.

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, 278504803 + ... + 278505094.

Almost surely, 2^81323444962 is an apocalyptic number.

81323444962 is a deficient number, since it is larger than the sum of its proper divisors (42332752394).

81323444962 is a wasteful number, since it uses less digits than its factorization.

81323444962 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 557009972.

The product of its digits is 995328, while the sum is 46.

The spelling of 81323444962 in words is "eighty-one billion, three hundred twenty-three million, four hundred forty-four thousand, nine hundred sixty-two".