1551561150019 has 2 divisors, whose sum is σ = 1551561150020. Its totient is φ = 1551561150018.

The previous prime is 1551561149993. The next prime is 1551561150043. The reversal of 1551561150019 is 9100511651551.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1551561150019 - 2¹³ = 1551561141827 is a prime.

It is a super-2 number, since 2×1551561150019² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1551561150079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 775780575009 + 775780575010.

It is an arithmetic number, because the mean of its divisors is an integer number (775780575010).

Almost surely, 2^{1551561150019} is an apocalyptic number.

1551561150019 is a deficient number, since it is larger than the sum of its proper divisors (1).

1551561150019 is an equidigital number, since it uses as much as digits as its factorization.

1551561150019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 33750, while the sum is 40.

The spelling of 1551561150019 in words is "one trillion, five hundred fifty-one billion, five hundred sixty-one million, one hundred fifty thousand, nineteen".