641053925 has 6 divisors (see below), whose sum is σ = 794906898. Its totient is φ = 512843120.

The previous prime is 641053879. The next prime is 641053927. The reversal of 641053925 is 529350146.

It can be written as a sum of positive squares in 3 ways, for example, as 3541924 + 637512001 = 1882^2 + 25249^2 .

It is a de Polignac number, because none of the positive numbers 2^k-641053925 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641053927) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12821054 + ... + 12821103.

It is an arithmetic number, because the mean of its divisors is an integer number (132484483).

Almost surely, 2^641053925 is an apocalyptic number.

It is an amenable number.

641053925 is a deficient number, since it is larger than the sum of its proper divisors (153852973).

641053925 is a wasteful number, since it uses less digits than its factorization.

641053925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25642167 (or 25642162 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 35.

The square root of 641053925 is about 25319.0427346691. The cubic root of 641053925 is about 862.2466608746.

The spelling of 641053925 in words is "six hundred forty-one million, fifty-three thousand, nine hundred twenty-five".