641005242553 has 8 divisors (see below), whose sum is σ = 690647013000. Its totient is φ = 591411139968.

The previous prime is 641005242517. The next prime is 641005242571. The reversal of 641005242553 is 355242500146.

It can be written as a sum of positive squares in 4 ways, for example, as 168169024 + 640837073529 = 12968^2 + 800523^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 641005242553 - 2¹³ = 641005234361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (641005242503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11889028 + ... + 11942821.

It is an arithmetic number, because the mean of its divisors is an integer number (86330876625).

Almost surely, 2^641005242553 is an apocalyptic number.

It is an amenable number.

641005242553 is a deficient number, since it is larger than the sum of its proper divisors (49641770447).

641005242553 is a wasteful number, since it uses less digits than its factorization.

641005242553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23833931.

The product of its (nonzero) digits is 144000, while the sum is 37.

Adding to 641005242553 its reverse (355242500146), we get a palindrome (996247742699).

The spelling of 641005242553 in words is "six hundred forty-one billion, five million, two hundred forty-two thousand, five hundred fifty-three".