40521920181 has 8 divisors (see below), whose sum is σ = 54769353600. Its totient is φ = 26644550112.

The previous prime is 40521920177. The next prime is 40521920207. The reversal of 40521920181 is 18102912504.

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

It is not a de Polignac number, because 40521920181 - 2² = 40521920177 is a prime.

It is a super-2 number, since 2×40521920181² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40521920161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92515581 + ... + 92516018.

It is an arithmetic number, because the mean of its divisors is an integer number (6846169200).

Almost surely, 2^40521920181 is an apocalyptic number.

It is an amenable number.

40521920181 is a deficient number, since it is larger than the sum of its proper divisors (14247433419).

40521920181 is a wasteful number, since it uses less digits than its factorization.

40521920181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185031675.

The product of its (nonzero) digits is 5760, while the sum is 33.

The spelling of 40521920181 in words is "forty billion, five hundred twenty-one million, nine hundred twenty thousand, one hundred eighty-one".