94081581 has 48 divisors (see below), whose sum is σ = 156531648. Its totient is φ = 55987200.

The previous prime is 94081573. The next prime is 94081591. The reversal of 94081581 is 18518049.

It is not a de Polignac number, because 94081581 - 2³ = 94081573 is a prime.

It is a super-2 number, since 2×94081581² = 17702687766919122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (94081501) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 162765 + ... + 163341.

It is an arithmetic number, because the mean of its divisors is an integer number (3261076).

Almost surely, 2^94081581 is an apocalyptic number.

It is an amenable number.

94081581 is a deficient number, since it is larger than the sum of its proper divisors (62450067).

94081581 is a wasteful number, since it uses less digits than its factorization.

94081581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 664 (or 652 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 36.

The square root of 94081581 is about 9699.5660212197. The cubic root of 94081581 is about 454.8150937270.

The spelling of 94081581 in words is "ninety-four million, eighty-one thousand, five hundred eighty-one".