40561647 has 16 divisors (see below), whose sum is σ = 62657280. Its totient is φ = 22859712.

The previous prime is 40561639. The next prime is 40561663. The reversal of 40561647 is 74616504.

It is not a de Polignac number, because 40561647 - 2³ = 40561639 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40561607) 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, 11697 + ... + 14762.

It is an arithmetic number, because the mean of its divisors is an integer number (3916080).

Almost surely, 2^40561647 is an apocalyptic number.

40561647 is a deficient number, since it is larger than the sum of its proper divisors (22095633).

40561647 is a wasteful number, since it uses less digits than its factorization.

40561647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26542.

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 40561647 is about 6368.8026347187. The cubic root of 40561647 is about 343.5884268995.

The spelling of 40561647 in words is "forty million, five hundred sixty-one thousand, six hundred forty-seven".