1561036050 has 480 divisors, whose sum is σ = 5444651520. Its totient is φ = 323481600.

The previous prime is 1561036049. The next prime is 1561036073. The reversal of 1561036050 is 506301651.

It is a happy number.

1561036050 is a `hidden beast` number, since 1 + 56 + 1 + 0 + 3 + 605 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 19759911 + ... + 19759989.

It is an arithmetic number, because the mean of its divisors is an integer number (11343024).

Almost surely, 2^1561036050 is an apocalyptic number.

1561036050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1561036050, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2722325760).

1561036050 is an abundant number, since it is smaller than the sum of its proper divisors (3883615470).

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

1561036050 is a wasteful number, since it uses less digits than its factorization.

1561036050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168 (or 154 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 27.

The square root of 1561036050 is about 39509.9487471194. The cubic root of 1561036050 is about 1160.0346922839.

The spelling of 1561036050 in words is "one billion, five hundred sixty-one million, thirty-six thousand, fifty".