81456001 has 8 divisors (see below), whose sum is σ = 88929504. Its totient is φ = 73993920.

The previous prime is 81455989. The next prime is 81456007. The reversal of 81456001 is 10065418.

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

It is a de Polignac number, because none of the positive numbers 2^k-81456001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81456007) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20185 + ... + 23881.

It is an arithmetic number, because the mean of its divisors is an integer number (11116188).

Almost surely, 2^81456001 is an apocalyptic number.

It is an amenable number.

81456001 is a deficient number, since it is larger than the sum of its proper divisors (7473503).

81456001 is a wasteful number, since it uses less digits than its factorization.

81456001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5711.

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 81456001 is about 9025.2978344208. The cubic root of 81456001 is about 433.4852870775.

The spelling of 81456001 in words is "eighty-one million, four hundred fifty-six thousand, one".