40621164491 has 4 divisors (see below), whose sum is σ = 40621593312. Its totient is φ = 40620735672.

The previous prime is 40621164443. The next prime is 40621164497. The reversal of 40621164491 is 19446112604.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 40621164491 - 2¹⁴ = 40621148107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40621164497) 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, 2516 + ... + 285041.

It is an arithmetic number, because the mean of its divisors is an integer number (10155398328).

Almost surely, 2^40621164491 is an apocalyptic number.

40621164491 is a deficient number, since it is larger than the sum of its proper divisors (428821).

40621164491 is a wasteful number, since it uses less digits than its factorization.

40621164491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428820.

The product of its (nonzero) digits is 41472, while the sum is 38.

The spelling of 40621164491 in words is "forty billion, six hundred twenty-one million, one hundred sixty-four thousand, four hundred ninety-one".