2161636080 has 80 divisors (see below), whose sum is σ = 7053774720. Its totient is φ = 546096384.

The previous prime is 2161636067. The next prime is 2161636093. The reversal of 2161636080 is 806361612.

2161636080 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2161636067) and next prime (2161636093).

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 232462 + ... + 241581.

It is an arithmetic number, because the mean of its divisors is an integer number (88172184).

Almost surely, 2^2161636080 is an apocalyptic number.

2161636080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2161636080 is an abundant number, since it is smaller than the sum of its proper divisors (4892138640).

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

2161636080 is a wasteful number, since it uses less digits than its factorization.

2161636080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 474078 (or 474072 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 2161636080 is about 46493.3982410406. The cubic root of 2161636080 is about 1292.9871045680.

Adding to 2161636080 its reverse (806361612), we get a palindrome (2967997692).

The spelling of 2161636080 in words is "two billion, one hundred sixty-one million, six hundred thirty-six thousand, eighty".