641954267153 has 2 divisors, whose sum is σ = 641954267154. Its totient is φ = 641954267152.

The previous prime is 641954267083. The next prime is 641954267159. The reversal of 641954267153 is 351762459146.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 340149067729 + 301805199424 = 583223^2 + 549368^2 .

It is a cyclic number.

It is not a de Polignac number, because 641954267153 - 2²⁴ = 641937489937 is a prime.

It is a super-2 number, since 2×641954267153² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 641954267095 and 641954267104.

It is not a weakly prime, because it can be changed into another prime (641954267159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320977133576 + 320977133577.

It is an arithmetic number, because the mean of its divisors is an integer number (320977133577).

Almost surely, 2^641954267153 is an apocalyptic number.

It is an amenable number.

641954267153 is a deficient number, since it is larger than the sum of its proper divisors (1).

641954267153 is an equidigital number, since it uses as much as digits as its factorization.

641954267153 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5443200, while the sum is 53.

The spelling of 641954267153 in words is "six hundred forty-one billion, nine hundred fifty-four million, two hundred sixty-seven thousand, one hundred fifty-three".