641245440245 has 8 divisors (see below), whose sum is σ = 769499858520. Its totient is φ = 512992798720.

The previous prime is 641245440239. The next prime is 641245440281. The reversal of 641245440245 is 542044542146.

It can be written as a sum of positive squares in 4 ways, for example, as 219565342084 + 421680098161 = 468578^2 + 649369^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 641245440245 - 2⁶ = 641245440181 is a prime.

It is a super-2 number, since 2×641245440245² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 553565 + ... + 1260525.

It is an arithmetic number, because the mean of its divisors is an integer number (96187482315).

Almost surely, 2^641245440245 is an apocalyptic number.

It is an amenable number.

641245440245 is a deficient number, since it is larger than the sum of its proper divisors (128254418275).

641245440245 is a wasteful number, since it uses less digits than its factorization.

641245440245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 888375.

The product of its (nonzero) digits is 614400, while the sum is 41.

The spelling of 641245440245 in words is "six hundred forty-one billion, two hundred forty-five million, four hundred forty thousand, two hundred forty-five".