473961905621 has 4 divisors (see below), whose sum is σ = 486771686892. Its totient is φ = 461152124352.

The previous prime is 473961905563. The next prime is 473961905629. The reversal of 473961905621 is 126509169374.

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

It can be written as a sum of positive squares in 2 ways, for example, as 353209130596 + 120752775025 = 594314^2 + 347495^2 .

It is a cyclic number.

It is not a de Polignac number, because 473961905621 - 2²² = 473957711317 is a prime.

It is a super-2 number, since 2×473961905621² (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 (473961905629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6404890580 + ... + 6404890653.

It is an arithmetic number, because the mean of its divisors is an integer number (121692921723).

Almost surely, 2^473961905621 is an apocalyptic number.

It is an amenable number.

473961905621 is a deficient number, since it is larger than the sum of its proper divisors (12809781271).

473961905621 is a wasteful number, since it uses less digits than its factorization.

473961905621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12809781270.

The product of its (nonzero) digits is 2449440, while the sum is 53.

The spelling of 473961905621 in words is "four hundred seventy-three billion, nine hundred sixty-one million, nine hundred five thousand, six hundred twenty-one".