1561048529555 has 16 divisors (see below), whose sum is σ = 1877539123200. Its totient is φ = 1245985431552.

The previous prime is 1561048529507. The next prime is 1561048529603. The reversal of 1561048529555 is 5559258401651.

It is an interprime number because it is at equal distance from previous prime (1561048529507) and next prime (1561048529603).

It is a cyclic number.

It is not a de Polignac number, because 1561048529555 - 2¹² = 1561048525459 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1561048529555.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29219027 + ... + 29272403.

It is an arithmetic number, because the mean of its divisors is an integer number (117346195200).

Almost surely, 2^{1561048529555} is an apocalyptic number.

1561048529555 is a deficient number, since it is larger than the sum of its proper divisors (316490593645).

1561048529555 is a wasteful number, since it uses less digits than its factorization.

1561048529555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66638.

The product of its (nonzero) digits is 10800000, while the sum is 56.

The spelling of 1561048529555 in words is "one trillion, five hundred sixty-one billion, forty-eight million, five hundred twenty-nine thousand, five hundred fifty-five".