473564216621 has 4 divisors (see below), whose sum is σ = 473583656544. Its totient is φ = 473544776700.

The previous prime is 473564216539. The next prime is 473564216633. The reversal of 473564216621 is 126612465374.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 473564216621 - 2³⁴ = 456384347437 is a prime.

It is a super-2 number, since 2×473564216621² (a number of 24 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 (473564216651) 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, 9683375 + ... + 9732156.

It is an arithmetic number, because the mean of its divisors is an integer number (118395914136).

Almost surely, 2^473564216621 is an apocalyptic number.

It is an amenable number.

473564216621 is a deficient number, since it is larger than the sum of its proper divisors (19439923).

473564216621 is a wasteful number, since it uses less digits than its factorization.

473564216621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19439922.

The product of its digits is 1451520, while the sum is 47.

The spelling of 473564216621 in words is "four hundred seventy-three billion, five hundred sixty-four million, two hundred sixteen thousand, six hundred twenty-one".