1161556506 has 48 divisors (see below), whose sum is σ = 2809366560. Its totient is φ = 343798560.

The previous prime is 1161556499. The next prime is 1161556519. The reversal of 1161556506 is 6056551611.

1161556506 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 59701 + ... + 76728.

It is an arithmetic number, because the mean of its divisors is an integer number (58528470).

Almost surely, 2^1161556506 is an apocalyptic number.

1161556506 is an abundant number, since it is smaller than the sum of its proper divisors (1647810054).

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

1161556506 is a wasteful number, since it uses less digits than its factorization.

1161556506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136491 (or 136488 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 36.

The square root of 1161556506 is about 34081.6153666460. The cubic root of 1161556506 is about 1051.1873208388.

It can be divided in two parts, 11615 and 56506, that added together give a square (68121 = 261²).

The spelling of 1161556506 in words is "one billion, one hundred sixty-one million, five hundred fifty-six thousand, five hundred six".