621799008342642 has 48 divisors (see below), whose sum is σ = 1497666428713728. Its totient is φ = 185151069479520.

The previous prime is 621799008342637. The next prime is 621799008342649. The reversal of 621799008342642 is 246243800997126.

621799008342642 is a `hidden beast` number, since 6 + 2 + 1 + 7 + 9 + 90 + 0 + 83 + 426 + 42 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 621799008342642.

It is not an unprimeable number, because it can be changed into a prime (621799008342649) 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 23 ways as a sum of consecutive naturals, for example, 42859036608 + ... + 42859051115.

It is an arithmetic number, because the mean of its divisors is an integer number (31201383931536).

Almost surely, 2^{621799008342642} is an apocalyptic number.

621799008342642 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

621799008342642 is an abundant number, since it is smaller than the sum of its proper divisors (875867420371086).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

621799008342642 is a wasteful number, since it uses less digits than its factorization.

621799008342642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85718087775 (or 85718087772 counting only the distinct ones).

The product of its (nonzero) digits is 62705664, while the sum is 63.

The spelling of 621799008342642 in words is "six hundred twenty-one trillion, seven hundred ninety-nine billion, eight million, three hundred forty-two thousand, six hundred forty-two".