621050782493 has 4 divisors (see below), whose sum is σ = 625218908700. Its totient is φ = 616882656288.

The previous prime is 621050782433. The next prime is 621050782519. The reversal of 621050782493 is 394287050126.

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 75222387289 + 545828395204 = 274267^2 + 738802^2 .

It is a cyclic number.

It is not a de Polignac number, because 621050782493 - 2⁸ = 621050782237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621050782433) 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, 2084062880 + ... + 2084063177.

It is an arithmetic number, because the mean of its divisors is an integer number (156304727175).

It is a 1-persistent number, because it is pandigital, but 2⋅621050782493 = 1242101564986 is not.

Almost surely, 2^621050782493 is an apocalyptic number.

It is an amenable number.

621050782493 is a deficient number, since it is larger than the sum of its proper divisors (4168126207).

621050782493 is a wasteful number, since it uses less digits than its factorization.

621050782493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4168126206.

The product of its (nonzero) digits is 725760, while the sum is 47.

The spelling of 621050782493 in words is "six hundred twenty-one billion, fifty million, seven hundred eighty-two thousand, four hundred ninety-three".