1365555521051 has 2 divisors, whose sum is σ = 1365555521052. Its totient is φ = 1365555521050.

The previous prime is 1365555521039. The next prime is 1365555521081. The reversal of 1365555521051 is 1501255555631.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1365555521051 - 2¹⁰ = 1365555520027 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1365555520993 and 1365555521011.

It is not a weakly prime, because it can be changed into another prime (1365555521081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 682777760525 + 682777760526.

It is an arithmetic number, because the mean of its divisors is an integer number (682777760526).

Almost surely, 2^{1365555521051} is an apocalyptic number.

1365555521051 is a deficient number, since it is larger than the sum of its proper divisors (1).

1365555521051 is an equidigital number, since it uses as much as digits as its factorization.

1365555521051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 562500, while the sum is 44.

The spelling of 1365555521051 in words is "one trillion, three hundred sixty-five billion, five hundred fifty-five million, five hundred twenty-one thousand, fifty-one".