40164081 has 32 divisors (see below), whose sum is σ = 60278400. Its totient is φ = 23639040.

The previous prime is 40164079. The next prime is 40164109. The reversal of 40164081 is 18046104.

It is not a de Polignac number, because 40164081 - 2¹ = 40164079 is a prime.

It is a super-2 number, since 2×40164081² = 3226306805149122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40164031) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 175275 + ... + 175503.

It is an arithmetic number, because the mean of its divisors is an integer number (1883700).

Almost surely, 2^40164081 is an apocalyptic number.

It is an amenable number.

40164081 is a deficient number, since it is larger than the sum of its proper divisors (20114319).

40164081 is a wasteful number, since it uses less digits than its factorization.

40164081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449.

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 40164081 is about 6337.5137869673. The cubic root of 40164081 is about 342.4621756585.

The spelling of 40164081 in words is "forty million, one hundred sixty-four thousand, eighty-one".