40181621044 has 24 divisors (see below), whose sum is σ = 73048521728. Its totient is φ = 19318871520.

The previous prime is 40181620987. The next prime is 40181621057. The reversal of 40181621044 is 44012618104.

It is a super-2 number, since 2×40181621044² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a junction number, because it is equal to n+sod(n) for n = 40181620997 and 40181621015.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1012524 + ... + 1051459.

Almost surely, 2^40181621044 is an apocalyptic number.

It is an amenable number.

40181621044 is a deficient number, since it is larger than the sum of its proper divisors (32866900684).

40181621044 is a wasteful number, since it uses less digits than its factorization.

40181621044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2064175 (or 2064173 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 31.

The spelling of 40181621044 in words is "forty billion, one hundred eighty-one million, six hundred twenty-one thousand, forty-four".