2251524605669 has 2 divisors, whose sum is σ = 2251524605670. Its totient is φ = 2251524605668.

The previous prime is 2251524605647. The next prime is 2251524605689. The reversal of 2251524605669 is 9665064251522.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1553856985444 + 697667620225 = 1246538^2 + 835265^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2251524605669 is a prime.

It is a super-2 number, since 2×2251524605669² (a number of 26 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2251524605669.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2251524605639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1125762302834 + 1125762302835.

It is an arithmetic number, because the mean of its divisors is an integer number (1125762302835).

Almost surely, 2^{2251524605669} is an apocalyptic number.

It is an amenable number.

2251524605669 is a deficient number, since it is larger than the sum of its proper divisors (1).

2251524605669 is an equidigital number, since it uses as much as digits as its factorization.

2251524605669 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776000, while the sum is 53.

The spelling of 2251524605669 in words is "two trillion, two hundred fifty-one billion, five hundred twenty-four million, six hundred five thousand, six hundred sixty-nine".