81322037063 has 4 divisors (see below), whose sum is σ = 86105686320. Its totient is φ = 76538387808.

The previous prime is 81322037039. The next prime is 81322037081. The reversal of 81322037063 is 36073022318.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-81322037063 is a prime.

It is a super-2 number, since 2×81322037063² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81322039063) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 2391824603 + ... + 2391824636.

It is an arithmetic number, because the mean of its divisors is an integer number (21526421580).

Almost surely, 2^81322037063 is an apocalyptic number.

81322037063 is a deficient number, since it is larger than the sum of its proper divisors (4783649257).

81322037063 is a wasteful number, since it uses less digits than its factorization.

81322037063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4783649256.

The product of its (nonzero) digits is 36288, while the sum is 35.

The spelling of 81322037063 in words is "eighty-one billion, three hundred twenty-two million, thirty-seven thousand, sixty-three".