40161600661 has 16 divisors (see below), whose sum is σ = 49444745728. Its totient is φ = 31766515200.

The previous prime is 40161600643. The next prime is 40161600667. The reversal of 40161600661 is 16600616104.

It is not a de Polignac number, because 40161600661 - 2⁵ = 40161600629 is a prime.

It is a super-2 number, since 2×40161600661² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40161600667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 240196 + ... + 371506.

It is an arithmetic number, because the mean of its divisors is an integer number (3090296608).

Almost surely, 2^40161600661 is an apocalyptic number.

It is an amenable number.

40161600661 is a deficient number, since it is larger than the sum of its proper divisors (9283145067).

40161600661 is a wasteful number, since it uses less digits than its factorization.

40161600661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134692.

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

The spelling of 40161600661 in words is "forty billion, one hundred sixty-one million, six hundred thousand, six hundred sixty-one".