81332401324 has 12 divisors (see below), whose sum is σ = 142419627000. Its totient is φ = 40641079328.

The previous prime is 81332401321. The next prime is 81332401363. The reversal of 81332401324 is 42310423318.

It is a happy number.

It is a super-2 number, since 2×81332401324² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (81332401321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6273049 + ... + 6286000.

It is an arithmetic number, because the mean of its divisors is an integer number (11868302250).

Almost surely, 2^81332401324 is an apocalyptic number.

It is an amenable number.

81332401324 is a deficient number, since it is larger than the sum of its proper divisors (61087225676).

81332401324 is a wasteful number, since it uses less digits than its factorization.

81332401324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12560672 (or 12560670 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 31.

The spelling of 81332401324 in words is "eighty-one billion, three hundred thirty-two million, four hundred one thousand, three hundred twenty-four".