81026702263 has 16 divisors (see below), whose sum is σ = 92141975520. Its totient is φ = 70633766016.

The previous prime is 81026702249. The next prime is 81026702291. The reversal of 81026702263 is 36220762018.

It is a cyclic number.

It is not a de Polignac number, because 81026702263 - 2²¹ = 81024605111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81026702203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 439120 + ... + 595717.

It is an arithmetic number, because the mean of its divisors is an integer number (5758873470).

Almost surely, 2^81026702263 is an apocalyptic number.

81026702263 is a deficient number, since it is larger than the sum of its proper divisors (11115273257).

81026702263 is a wasteful number, since it uses less digits than its factorization.

81026702263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1035186.

The product of its (nonzero) digits is 48384, while the sum is 37.

The spelling of 81026702263 in words is "eighty-one billion, twenty-six million, seven hundred two thousand, two hundred sixty-three".