625989910841 has 4 divisors (see below), whose sum is σ = 626412592884. Its totient is φ = 625567228800.

The previous prime is 625989910823. The next prime is 625989910849. The reversal of 625989910841 is 148019989526.

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 413229123241 + 212760787600 = 642829^2 + 461260^2 .

It is a cyclic number.

It is not a de Polignac number, because 625989910841 - 2¹⁴ = 625989894457 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (625989910849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 211338800 + ... + 211341761.

It is an arithmetic number, because the mean of its divisors is an integer number (156603148221).

Almost surely, 2^625989910841 is an apocalyptic number.

It is an amenable number.

625989910841 is a deficient number, since it is larger than the sum of its proper divisors (422682043).

625989910841 is a wasteful number, since it uses less digits than its factorization.

625989910841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422682042.

The product of its (nonzero) digits is 11197440, while the sum is 62.

The spelling of 625989910841 in words is "six hundred twenty-five billion, nine hundred eighty-nine million, nine hundred ten thousand, eight hundred forty-one".