1551253270873 has 2 divisors, whose sum is σ = 1551253270874. Its totient is φ = 1551253270872.

The previous prime is 1551253270859. The next prime is 1551253270961. The reversal of 1551253270873 is 3780723521551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1525047165184 + 26206105689 = 1234928^2 + 161883^2 .

It is a cyclic number.

It is not a de Polignac number, because 1551253270873 - 2⁵ = 1551253270841 is a prime.

It is a super-2 number, since 2×1551253270873² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1551253273873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 775626635436 + 775626635437.

It is an arithmetic number, because the mean of its divisors is an integer number (775626635437).

Almost surely, 2^{1551253270873} is an apocalyptic number.

It is an amenable number.

1551253270873 is a deficient number, since it is larger than the sum of its proper divisors (1).

1551253270873 is an equidigital number, since it uses as much as digits as its factorization.

1551253270873 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1764000, while the sum is 49.

The spelling of 1551253270873 in words is "one trillion, five hundred fifty-one billion, two hundred fifty-three million, two hundred seventy thousand, eight hundred seventy-three".