81452912 has 10 divisors (see below), whose sum is σ = 157815048. Its totient is φ = 40726448.

The previous prime is 81452911. The next prime is 81452951. The reversal of 81452912 is 21925418.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81452911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2545388 + ... + 2545419.

Almost surely, 2^81452912 is an apocalyptic number.

It is an amenable number.

81452912 is a deficient number, since it is larger than the sum of its proper divisors (76362136).

81452912 is a wasteful number, since it uses less digits than its factorization.

81452912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5090815 (or 5090809 counting only the distinct ones).

The product of its digits is 5760, while the sum is 32.

The square root of 81452912 is about 9025.1267027117. The cubic root of 81452912 is about 433.4798074199.

The spelling of 81452912 in words is "eighty-one million, four hundred fifty-two thousand, nine hundred twelve".