40161649 has 8 divisors (see below), whose sum is σ = 46118880. Its totient is φ = 34588800.

The previous prime is 40161643. The next prime is 40161677. The reversal of 40161649 is 94616104.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40161649 is a prime.

It is a super-2 number, since 2×40161649² = 3225916100798402, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40161649.

It is not an unprimeable number, because it can be changed into a prime (40161643) 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, 95872 + ... + 96289.

It is an arithmetic number, because the mean of its divisors is an integer number (5764860).

Almost surely, 2^40161649 is an apocalyptic number.

It is an amenable number.

40161649 is a deficient number, since it is larger than the sum of its proper divisors (5957231).

40161649 is a wasteful number, since it uses less digits than its factorization.

40161649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192191.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 40161649 is about 6337.3219107128. The cubic root of 40161649 is about 342.4552633063.

It can be divided in two parts, 4016 and 1649, that added together give a palindrome (5665).

The spelling of 40161649 in words is "forty million, one hundred sixty-one thousand, six hundred forty-nine".