81263078623 has 8 divisors (see below), whose sum is σ = 83905740800. Its totient is φ = 78621746040.

The previous prime is 81263078569. The next prime is 81263078627. The reversal of 81263078623 is 32687036218.

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

It is a cyclic number.

It is not a de Polignac number, because 81263078623 - 2⁹ = 81263078111 is a prime.

It is a super-2 number, since 2×81263078623² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81263078627) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 207423 + ... + 453376.

It is an arithmetic number, because the mean of its divisors is an integer number (10488217600).

Almost surely, 2^81263078623 is an apocalyptic number.

81263078623 is a deficient number, since it is larger than the sum of its proper divisors (2642662177).

81263078623 is a wasteful number, since it uses less digits than its factorization.

81263078623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 664797.

The product of its (nonzero) digits is 580608, while the sum is 46.

The spelling of 81263078623 in words is "eighty-one billion, two hundred sixty-three million, seventy-eight thousand, six hundred twenty-three".