1551253270961 has 2 divisors, whose sum is σ = 1551253270962. Its totient is φ = 1551253270960.

The previous prime is 1551253270873. The next prime is 1551253271017. The reversal of 1551253270961 is 1690723521551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1163334816400 + 387918454561 = 1078580^2 + 622831^2 .

It is an emirp because it is prime and its reverse (1690723521551) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1551253270961 is a prime.

It is not a weakly prime, because it can be changed into another prime (1551253270261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 775626635480 + 775626635481.

It is an arithmetic number, because the mean of its divisors is an integer number (775626635481).

Almost surely, 2^{1551253270961} is an apocalyptic number.

It is an amenable number.

1551253270961 is a deficient number, since it is larger than the sum of its proper divisors (1).

1551253270961 is an equidigital number, since it uses as much as digits as its factorization.

1551253270961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 567000, while the sum is 47.

The spelling of 1551253270961 in words is "one trillion, five hundred fifty-one billion, two hundred fifty-three million, two hundred seventy thousand, nine hundred sixty-one".