40407647065561 has 16 divisors (see below), whose sum is σ = 41195196207360. Its totient is φ = 39626478875520.

The previous prime is 40407647065553. The next prime is 40407647065567. The reversal of 40407647065561 is 16556074670404.

It is a cyclic number.

It is not a de Polignac number, because 40407647065561 - 2³ = 40407647065553 is a prime.

It is a super-3 number, since 3×40407647065561³ (a number of 42 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40407647065567) 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, 105795811 + ... + 106177063.

It is an arithmetic number, because the mean of its divisors is an integer number (2574699762960).

Almost surely, 2^{40407647065561} is an apocalyptic number.

It is an amenable number.

40407647065561 is a deficient number, since it is larger than the sum of its proper divisors (787549141799).

40407647065561 is a wasteful number, since it uses less digits than its factorization.

40407647065561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389616.

The product of its (nonzero) digits is 16934400, while the sum is 55.

The spelling of 40407647065561 in words is "forty trillion, four hundred seven billion, six hundred forty-seven million, sixty-five thousand, five hundred sixty-one".