63620240491 has 4 divisors (see below), whose sum is σ = 63621600984. Its totient is φ = 63618880000.

The previous prime is 63620240477. The next prime is 63620240531. The reversal of 63620240491 is 19404202636.

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 63620240491 - 2⁷ = 63620240363 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 63620240491.

It is not an unprimeable number, because it can be changed into a prime (63620240461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 607510 + ... + 704491.

It is an arithmetic number, because the mean of its divisors is an integer number (15905400246).

Almost surely, 2^63620240491 is an apocalyptic number.

63620240491 is a deficient number, since it is larger than the sum of its proper divisors (1360493).

63620240491 is a wasteful number, since it uses less digits than its factorization.

63620240491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1360492.

The product of its (nonzero) digits is 62208, while the sum is 37.

The spelling of 63620240491 in words is "sixty-three billion, six hundred twenty million, two hundred forty thousand, four hundred ninety-one".