621326153264242 has 4 divisors (see below), whose sum is σ = 931989229896366. Its totient is φ = 310663076632120.

The previous prime is 621326153264189. The next prime is 621326153264249. The reversal of 621326153264242 is 242462351623126.

621326153264242 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in only one way, i.e., 595290657219241 + 26035496045001 = 24398579^2 + 5102499^2 .

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (621326153264249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155331538316059 + ... + 155331538316062.

Almost surely, 2^{621326153264242} is an apocalyptic number.

621326153264242 is a deficient number, since it is larger than the sum of its proper divisors (310663076632124).

621326153264242 is a wasteful number, since it uses less digits than its factorization.

621326153264242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310663076632123.

The product of its digits is 4976640, while the sum is 49.

The spelling of 621326153264242 in words is "six hundred twenty-one trillion, three hundred twenty-six billion, one hundred fifty-three million, two hundred sixty-four thousand, two hundred forty-two".