40521650530551 has 4 divisors (see below), whose sum is σ = 54028867374072. Its totient is φ = 27014433687032.

The previous prime is 40521650530547. The next prime is 40521650530567. The reversal of 40521650530551 is 15503505612504.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40521650530551 - 2² = 40521650530547 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40521650530511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6753608421756 + ... + 6753608421761.

It is an arithmetic number, because the mean of its divisors is an integer number (13507216843518).

Almost surely, 2^{40521650530551} is an apocalyptic number.

40521650530551 is a deficient number, since it is larger than the sum of its proper divisors (13507216843521).

40521650530551 is a wasteful number, since it uses less digits than its factorization.

40521650530551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13507216843520.

The product of its (nonzero) digits is 450000, while the sum is 42.

The spelling of 40521650530551 in words is "forty trillion, five hundred twenty-one billion, six hundred fifty million, five hundred thirty thousand, five hundred fifty-one".