621733196481 has 4 divisors (see below), whose sum is σ = 828977595312. Its totient is φ = 414488797652.

The previous prime is 621733196477. The next prime is 621733196531. The reversal of 621733196481 is 184691337126.

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 621733196481 - 2² = 621733196477 is a prime.

It is a super-2 number, since 2×621733196481² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (621733192481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103622199411 + ... + 103622199416.

It is an arithmetic number, because the mean of its divisors is an integer number (207244398828).

Almost surely, 2^621733196481 is an apocalyptic number.

It is an amenable number.

621733196481 is a deficient number, since it is larger than the sum of its proper divisors (207244398831).

621733196481 is a wasteful number, since it uses less digits than its factorization.

621733196481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207244398830.

The product of its digits is 1306368, while the sum is 51.

The spelling of 621733196481 in words is "six hundred twenty-one billion, seven hundred thirty-three million, one hundred ninety-six thousand, four hundred eighty-one".