81246744635 has 16 divisors (see below), whose sum is σ = 111651063552. Its totient is φ = 55598575200.

The previous prime is 81246744629. The next prime is 81246744653. The reversal of 81246744635 is 53644764218.

It is not a de Polignac number, because 81246744635 - 2⁶ = 81246744571 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2346701 + ... + 2381070.

It is an arithmetic number, because the mean of its divisors is an integer number (6978191472).

Almost surely, 2^81246744635 is an apocalyptic number.

81246744635 is a deficient number, since it is larger than the sum of its proper divisors (30404318917).

81246744635 is a wasteful number, since it uses less digits than its factorization.

81246744635 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4728274.

The product of its digits is 3870720, while the sum is 50.

The spelling of 81246744635 in words is "eighty-one billion, two hundred forty-six million, seven hundred forty-four thousand, six hundred thirty-five".