81825701476 has 24 divisors (see below), whose sum is σ = 144533862144. Its totient is φ = 40530672000.

The previous prime is 81825701471. The next prime is 81825701491. The reversal of 81825701476 is 67410752818.

It is not an unprimeable number, because it can be changed into a prime (81825701471) 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, 888601 + ... + 976351.

It is an arithmetic number, because the mean of its divisors is an integer number (6022244256).

Almost surely, 2^81825701476 is an apocalyptic number.

It is an amenable number.

81825701476 is a deficient number, since it is larger than the sum of its proper divisors (62708160668).

81825701476 is a wasteful number, since it uses less digits than its factorization.

81825701476 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89931 (or 89929 counting only the distinct ones).

The product of its (nonzero) digits is 752640, while the sum is 49.

The spelling of 81825701476 in words is "eighty-one billion, eight hundred twenty-five million, seven hundred one thousand, four hundred seventy-six".