1561150536 has 64 divisors (see below), whose sum is σ = 4299912000. Its totient is φ = 468384000.

The previous prime is 1561150531. The next prime is 1561150541. The reversal of 1561150536 is 6350511651.

It is an interprime number because it is at equal distance from previous prime (1561150531) and next prime (1561150541).

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 1561150497 and 1561150506.

It is not an unprimeable number, because it can be changed into a prime (1561150531) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2611 + ... + 55938.

It is an arithmetic number, because the mean of its divisors is an integer number (67186125).

Almost surely, 2^1561150536 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1561150536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2149956000).

1561150536 is an abundant number, since it is smaller than the sum of its proper divisors (2738761464).

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

1561150536 is a wasteful number, since it uses less digits than its factorization.

1561150536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58670 (or 58666 counting only the distinct ones).

The product of its (nonzero) digits is 13500, while the sum is 33.

The square root of 1561150536 is about 39511.3975455184. The cubic root of 1561150536 is about 1160.0630504770.

The spelling of 1561150536 in words is "one billion, five hundred sixty-one million, one hundred fifty thousand, five hundred thirty-six".