641365457351653 has 8 divisors (see below), whose sum is σ = 642734968382360. Its totient is φ = 639997152410880.

The previous prime is 641365457351651. The next prime is 641365457351753. The reversal of 641365457351653 is 356153754563146.

It can be written as a sum of positive squares in 4 ways, for example, as 196463337505444 + 444902119846209 = 14016538^2 + 21092703^2 .

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 641365457351653 - 2¹ = 641365457351651 is a prime.

It is a super-2 number, since 2×641365457351653² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641365457351651) 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, 300457800 + ... + 302584897.

It is an arithmetic number, because the mean of its divisors is an integer number (80341871047795).

Almost surely, 2^{641365457351653} is an apocalyptic number.

It is an amenable number.

641365457351653 is a deficient number, since it is larger than the sum of its proper divisors (1369511030707).

641365457351653 is a wasteful number, since it uses less digits than its factorization.

641365457351653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 603044967.

The product of its digits is 408240000, while the sum is 64.

The spelling of 641365457351653 in words is "six hundred forty-one trillion, three hundred sixty-five billion, four hundred fifty-seven million, three hundred fifty-one thousand, six hundred fifty-three".