40154661 has 12 divisors (see below), whose sum is σ = 58056492. Its totient is φ = 26744256.

The previous prime is 40154659. The next prime is 40154677. The reversal of 40154661 is 16645104.

It can be written as a sum of positive squares in 2 ways, for example, as 20520900 + 19633761 = 4530^2 + 4431^2 .

It is not a de Polignac number, because 40154661 - 2¹ = 40154659 is a prime.

It is a super-2 number, since 2×40154661² = 3224793600049842, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40154651) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15705 + ... + 18081.

It is an arithmetic number, because the mean of its divisors is an integer number (4838041).

Almost surely, 2^40154661 is an apocalyptic number.

It is an amenable number.

40154661 is a deficient number, since it is larger than the sum of its proper divisors (17901831).

40154661 is a wasteful number, since it uses less digits than its factorization.

40154661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4260 (or 4257 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 40154661 is about 6336.7705497359. The cubic root of 40154661 is about 342.4354001097.

Adding to 40154661 its reverse (16645104), we get a palindrome (56799765).

The spelling of 40154661 in words is "forty million, one hundred fifty-four thousand, six hundred sixty-one".