81533762 has 8 divisors (see below), whose sum is σ = 125144976. Its totient is φ = 39818772.

The previous prime is 81533747. The next prime is 81533791. The reversal of 81533762 is 26733518.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 473948 + ... + 474119.

It is an arithmetic number, because the mean of its divisors is an integer number (15643122).

Almost surely, 2^81533762 is an apocalyptic number.

81533762 is a deficient number, since it is larger than the sum of its proper divisors (43611214).

81533762 is a wasteful number, since it uses less digits than its factorization.

81533762 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 948112.

The product of its digits is 30240, while the sum is 35.

The square root of 81533762 is about 9029.6047532547. The cubic root of 81533762 is about 433.6231837263.

The spelling of 81533762 in words is "eighty-one million, five hundred thirty-three thousand, seven hundred sixty-two".