621606892473 has 64 divisors (see below), whose sum is σ = 1057592954880. Its totient is φ = 353474440704.

The previous prime is 621606892469. The next prime is 621606892481. The reversal of 621606892473 is 374298606126.

621606892473 is a `hidden beast` number, since 6 + 2 + 1 + 606 + 8 + 9 + 24 + 7 + 3 = 666.

621606892473 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 621606892473 - 2² = 621606892469 is a prime.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (621606892453) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 33549390 + ... + 33567912.

It is an arithmetic number, because the mean of its divisors is an integer number (16524889920).

Almost surely, 2^621606892473 is an apocalyptic number.

621606892473 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

It is an amenable number.

621606892473 is a deficient number, since it is larger than the sum of its proper divisors (435986062407).

621606892473 is a wasteful number, since it uses less digits than its factorization.

621606892473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19395 (or 19389 counting only the distinct ones).

The product of its (nonzero) digits is 5225472, while the sum is 54.

The spelling of 621606892473 in words is "six hundred twenty-one billion, six hundred six million, eight hundred ninety-two thousand, four hundred seventy-three".