15505625533 has 2 divisors, whose sum is σ = 15505625534. Its totient is φ = 15505625532.

The previous prime is 15505625501. The next prime is 15505625543. The reversal of 15505625533 is 33552650551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15290064409 + 215561124 = 123653^2 + 14682^2 .

It is a cyclic number.

It is not a de Polignac number, because 15505625533 - 2⁵ = 15505625501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15505625543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7752812766 + 7752812767.

It is an arithmetic number, because the mean of its divisors is an integer number (7752812767).

Almost surely, 2^15505625533 is an apocalyptic number.

It is an amenable number.

15505625533 is a deficient number, since it is larger than the sum of its proper divisors (1).

15505625533 is an equidigital number, since it uses as much as digits as its factorization.

15505625533 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 337500, while the sum is 40.

The spelling of 15505625533 in words is "fifteen billion, five hundred five million, six hundred twenty-five thousand, five hundred thirty-three".