40061343561 has 16 divisors (see below), whose sum is σ = 53800010880. Its totient is φ = 26515324800.

The previous prime is 40061343541. The next prime is 40061343593. The reversal of 40061343561 is 16534316004.

It is not a de Polignac number, because 40061343561 - 2⁵ = 40061343529 is a prime.

It is a super-2 number, since 2×40061343561² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (40061343541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 785701 + ... + 835133.

It is an arithmetic number, because the mean of its divisors is an integer number (3362500680).

Almost surely, 2^40061343561 is an apocalyptic number.

It is an amenable number.

40061343561 is a deficient number, since it is larger than the sum of its proper divisors (13738667319).

40061343561 is a wasteful number, since it uses less digits than its factorization.

40061343561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51376.

The product of its (nonzero) digits is 25920, while the sum is 33.

Adding to 40061343561 its reverse (16534316004), we get a palindrome (56595659565).

The spelling of 40061343561 in words is "forty billion, sixty-one million, three hundred forty-three thousand, five hundred sixty-one".