81060737800 has 96 divisors (see below), whose sum is σ = 215620931520. Its totient is φ = 27762451200.

The previous prime is 81060737789. The next prime is 81060737827. The reversal of 81060737800 is 873706018.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1295230 + ... + 1356370.

It is an arithmetic number, because the mean of its divisors is an integer number (2246051370).

Almost surely, 2^81060737800 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 81060737800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107810465760).

81060737800 is an abundant number, since it is smaller than the sum of its proper divisors (134560193720).

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

81060737800 is a wasteful number, since it uses less digits than its factorization.

81060737800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62111 (or 62102 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 40.

The spelling of 81060737800 in words is "eighty-one billion, sixty million, seven hundred thirty-seven thousand, eight hundred".