40181621045 has 8 divisors (see below), whose sum is σ = 48878465496. Its totient is φ = 31704950016.

The previous prime is 40181620987. The next prime is 40181621057. The reversal of 40181621045 is 54012618104.

It can be written as a sum of positive squares in 4 ways, for example, as 5026564 + 40176594481 = 2242^2 + 200441^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40181621045 is a prime.

It is a super-2 number, since 2×40181621045² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

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, 55042952 + ... + 55043681.

It is an arithmetic number, because the mean of its divisors is an integer number (6109808187).

Almost surely, 2^40181621045 is an apocalyptic number.

It is an amenable number.

40181621045 is a deficient number, since it is larger than the sum of its proper divisors (8696844451).

40181621045 is a wasteful number, since it uses less digits than its factorization.

40181621045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110086711.

The product of its (nonzero) digits is 7680, while the sum is 32.

The spelling of 40181621045 in words is "forty billion, one hundred eighty-one million, six hundred twenty-one thousand, forty-five".