1161001656 has 48 divisors (see below), whose sum is σ = 3188680560. Its totient is φ = 381548160.

The previous prime is 1161001643. The next prime is 1161001657. The reversal of 1161001656 is 6561001611.

1161001656 is a `hidden beast` number, since 1 + 1 + 6 + 1 + 0 + 0 + 1 + 656 = 666.

1161001656 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161001657) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 108445 + ... + 118668.

It is an arithmetic number, because the mean of its divisors is an integer number (66430845).

Almost surely, 2^1161001656 is an apocalyptic number.

It is an amenable number.

1161001656 is an abundant number, since it is smaller than the sum of its proper divisors (2027678904).

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

1161001656 is a wasteful number, since it uses less digits than its factorization.

1161001656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227196 (or 227189 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 27.

The square root of 1161001656 is about 34073.4743752380. The cubic root of 1161001656 is about 1051.0199178253.

The spelling of 1161001656 in words is "one billion, one hundred sixty-one million, one thousand, six hundred fifty-six".