1561048529556 has 24 divisors (see below), whose sum is σ = 3834154283680. Its totient is φ = 492962693472.

The previous prime is 1561048529507. The next prime is 1561048529603. The reversal of 1561048529556 is 6559258401651.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a junction number, because it is equal to n+sod(n) for n = 1561048529496 and 1561048529505.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3423351811 + ... + 3423352266.

Almost surely, 2^{1561048529556} is an apocalyptic number.

It is an amenable number.

1561048529556 is an abundant number, since it is smaller than the sum of its proper divisors (2273105754124).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1561048529556 is a wasteful number, since it uses less digits than its factorization.

1561048529556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6846704103 (or 6846704101 counting only the distinct ones).

The product of its (nonzero) digits is 12960000, while the sum is 57.

The spelling of 1561048529556 in words is "one trillion, five hundred sixty-one billion, forty-eight million, five hundred twenty-nine thousand, five hundred fifty-six".