81207060744 has 32 divisors (see below), whose sum is σ = 203050260000. Its totient is φ = 27064672512.

The previous prime is 81207060743. The next prime is 81207060757. The reversal of 81207060744 is 44706070218.

It is not an unprimeable number, because it can be changed into a prime (81207060743) 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, 117409 + ... + 419760.

It is an arithmetic number, because the mean of its divisors is an integer number (6345320625).

Almost surely, 2^81207060744 is an apocalyptic number.

It is an amenable number.

81207060744 is an abundant number, since it is smaller than the sum of its proper divisors (121843199256).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81207060744 is a wasteful number, since it uses less digits than its factorization.

81207060744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 543477 (or 543473 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 39.

The spelling of 81207060744 in words is "eighty-one billion, two hundred seven million, sixty thousand, seven hundred forty-four".