1521052320553 has 2 divisors, whose sum is σ = 1521052320554. Its totient is φ = 1521052320552.

The previous prime is 1521052320509. The next prime is 1521052320647. The reversal of 1521052320553 is 3550232501251.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 809951400729 + 711100919824 = 899973^2 + 843268^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1521052320553 is a prime.

It is not a weakly prime, because it can be changed into another prime (1521052320503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 760526160276 + 760526160277.

It is an arithmetic number, because the mean of its divisors is an integer number (760526160277).

Almost surely, 2^{1521052320553} is an apocalyptic number.

It is an amenable number.

1521052320553 is a deficient number, since it is larger than the sum of its proper divisors (1).

1521052320553 is an equidigital number, since it uses as much as digits as its factorization.

1521052320553 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45000, while the sum is 34.

The spelling of 1521052320553 in words is "one trillion, five hundred twenty-one billion, fifty-two million, three hundred twenty thousand, five hundred fifty-three".