81450000752 has 40 divisors (see below), whose sum is σ = 162191035776. Its totient is φ = 39602598336.

The previous prime is 81450000719. The next prime is 81450000767. The reversal of 81450000752 is 25700005418.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104588 + ... + 416939.

Almost surely, 2^81450000752 is an apocalyptic number.

It is an amenable number.

81450000752 is a deficient number, since it is larger than the sum of its proper divisors (80741035024).

81450000752 is a wasteful number, since it uses less digits than its factorization.

81450000752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 521805 (or 521799 counting only the distinct ones).

The product of its (nonzero) digits is 11200, while the sum is 32.

The spelling of 81450000752 in words is "eighty-one billion, four hundred fifty million, seven hundred fifty-two", and thus it is an aban number.