40521751669 has 8 divisors (see below), whose sum is σ = 46313743040. Its totient is φ = 34730552736.

The previous prime is 40521751639. The next prime is 40521751691. The reversal of 40521751669 is 96615712504.

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

It is a cyclic number.

It is not a de Polignac number, because 40521751669 - 2⁵ = 40521751637 is a prime.

It is a super-2 number, since 2×40521751669² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40521751619) 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, 84159 + ... + 296860.

It is an arithmetic number, because the mean of its divisors is an integer number (5789217880).

Almost surely, 2^40521751669 is an apocalyptic number.

It is an amenable number.

40521751669 is a deficient number, since it is larger than the sum of its proper divisors (5791991371).

40521751669 is a wasteful number, since it uses less digits than its factorization.

40521751669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396219.

The product of its (nonzero) digits is 453600, while the sum is 46.

The spelling of 40521751669 in words is "forty billion, five hundred twenty-one million, seven hundred fifty-one thousand, six hundred sixty-nine".