63621937847 has 4 divisors (see below), whose sum is σ = 68515933080. Its totient is φ = 58727942616.

The previous prime is 63621937829. The next prime is 63621937849. The reversal of 63621937847 is 74873912636.

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 63621937847 - 2¹⁴ = 63621921463 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 63621937792 and 63621937801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63621937849) 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, 2446997597 + ... + 2446997622.

It is an arithmetic number, because the mean of its divisors is an integer number (17128983270).

Almost surely, 2^63621937847 is an apocalyptic number.

63621937847 is a deficient number, since it is larger than the sum of its proper divisors (4893995233).

63621937847 is a wasteful number, since it uses less digits than its factorization.

63621937847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4893995232.

The product of its digits is 9144576, while the sum is 56.

The spelling of 63621937847 in words is "sixty-three billion, six hundred twenty-one million, nine hundred thirty-seven thousand, eight hundred forty-seven".