2161473556 has 24 divisors (see below), whose sum is σ = 4127639040. Its totient is φ = 982204800.

The previous prime is 2161473527. The next prime is 2161473581. The reversal of 2161473556 is 6553741612.

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, 263436 + ... + 271516.

It is an arithmetic number, because the mean of its divisors is an integer number (171984960).

Almost surely, 2^2161473556 is an apocalyptic number.

It is an amenable number.

2161473556 is a deficient number, since it is larger than the sum of its proper divisors (1966165484).

2161473556 is a wasteful number, since it uses less digits than its factorization.

2161473556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14175 (or 14173 counting only the distinct ones).

The product of its digits is 151200, while the sum is 40.

The square root of 2161473556 is about 46491.6503901507. The cubic root of 2161473556 is about 1292.9546990667.

The spelling of 2161473556 in words is "two billion, one hundred sixty-one million, four hundred seventy-three thousand, five hundred fifty-six".