81153156 has 24 divisors (see below), whose sum is σ = 216408640. Its totient is φ = 23186592.

The previous prime is 81153109. The next prime is 81153209. The reversal of 81153156 is 65135118.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 482971 + ... + 483138.

Almost surely, 2^81153156 is an apocalyptic number.

It is an amenable number.

81153156 is an abundant number, since it is smaller than the sum of its proper divisors (135255484).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81153156 is a wasteful number, since it uses less digits than its factorization.

81153156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 966123 (or 966121 counting only the distinct ones).

The product of its digits is 3600, while the sum is 30.

The square root of 81153156 is about 9008.5046483864. The cubic root of 81153156 is about 432.9474020812.

The spelling of 81153156 in words is "eighty-one million, one hundred fifty-three thousand, one hundred fifty-six".