1561550334 has 16 divisors (see below), whose sum is σ = 3306812688. Its totient is φ = 489898112.

The previous prime is 1561550323. The next prime is 1561550363. The reversal of 1561550334 is 4330551651.

It is a junction number, because it is equal to n+sod(n) for n = 1561550295 and 1561550304.

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, 7654557 + ... + 7654760.

It is an arithmetic number, because the mean of its divisors is an integer number (206675793).

Almost surely, 2^1561550334 is an apocalyptic number.

1561550334 is an abundant number, since it is smaller than the sum of its proper divisors (1745262354).

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

1561550334 is a wasteful number, since it uses less digits than its factorization.

1561550334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15309339.

The product of its (nonzero) digits is 27000, while the sum is 33.

The square root of 1561550334 is about 39516.4564959967. The cubic root of 1561550334 is about 1160.1620696066.

The spelling of 1561550334 in words is "one billion, five hundred sixty-one million, five hundred fifty thousand, three hundred thirty-four".