40561011 has 12 divisors (see below), whose sum is σ = 59108088. Its totient is φ = 26800704.

The previous prime is 40561007. The next prime is 40561033. The reversal of 40561011 is 11016504.

40561011 is a `hidden beast` number, since 40 + 5 + 610 + 11 = 666.

It is not a de Polignac number, because 40561011 - 2² = 40561007 is a prime.

It is a super-2 number, since 2×40561011² = 3290391226684242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40561211) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18925 + ... + 20958.

It is an arithmetic number, because the mean of its divisors is an integer number (4925674).

Almost surely, 2^40561011 is an apocalyptic number.

40561011 is a deficient number, since it is larger than the sum of its proper divisors (18547077).

40561011 is a wasteful number, since it uses less digits than its factorization.

40561011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40002 (or 39999 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 40561011 is about 6368.7527036304. The cubic root of 40561011 is about 343.5866310867.

Adding to 40561011 its reverse (11016504), we get a palindrome (51577515).

It can be divided in two parts, 405 and 61011, that added together give a palindrome (61416).

The spelling of 40561011 in words is "forty million, five hundred sixty-one thousand, eleven".