1550250824581 has 2 divisors, whose sum is σ = 1550250824582. Its totient is φ = 1550250824580.

The previous prime is 1550250824539. The next prime is 1550250824593. The reversal of 1550250824581 is 1854280520551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 828447656481 + 721803168100 = 910191^2 + 849590^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1550250824581 is a prime.

It is a super-2 number, since 2×1550250824581² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1550250824081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 775125412290 + 775125412291.

It is an arithmetic number, because the mean of its divisors is an integer number (775125412291).

Almost surely, 2^{1550250824581} is an apocalyptic number.

It is an amenable number.

1550250824581 is a deficient number, since it is larger than the sum of its proper divisors (1).

1550250824581 is an equidigital number, since it uses as much as digits as its factorization.

1550250824581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 640000, while the sum is 46.

The spelling of 1550250824581 in words is "one trillion, five hundred fifty billion, two hundred fifty million, eight hundred twenty-four thousand, five hundred eighty-one".