81060620767 has 6 divisors (see below), whose sum is σ = 94295007888. Its totient is φ = 69480532044.

The previous prime is 81060620749. The next prime is 81060620777. The reversal of 81060620767 is 76702606018.

It is a de Polignac number, because none of the positive numbers 2^k-81060620767 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 (81060620717) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 827149143 + ... + 827149240.

It is an arithmetic number, because the mean of its divisors is an integer number (15715834648).

Almost surely, 2^81060620767 is an apocalyptic number.

81060620767 is a deficient number, since it is larger than the sum of its proper divisors (13234387121).

81060620767 is a wasteful number, since it uses less digits than its factorization.

81060620767 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1654298397 (or 1654298390 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 43.

The spelling of 81060620767 in words is "eighty-one billion, sixty million, six hundred twenty thousand, seven hundred sixty-seven".