2161307376 has 120 divisors (see below), whose sum is σ = 6422401440. Its totient is φ = 676159488.

The previous prime is 2161307363. The next prime is 2161307419. The reversal of 2161307376 is 6737031612.

2161307376 is a `hidden beast` number, since 2 + 1 + 613 + 0 + 7 + 37 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 2161307376.

It is a congruent number.

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, 1058965 + ... + 1061003.

It is an arithmetic number, because the mean of its divisors is an integer number (53520012).

Almost surely, 2^2161307376 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 2161307376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3211200720).

2161307376 is an abundant number, since it is smaller than the sum of its proper divisors (4261094064).

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

2161307376 is a wasteful number, since it uses less digits than its factorization.

2161307376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2503 (or 2494 counting only the distinct ones).

The product of its (nonzero) digits is 31752, while the sum is 36.

The square root of 2161307376 is about 46489.8631531649. The cubic root of 2161307376 is about 1292.9215629193.

Adding to 2161307376 its reverse (6737031612), we get a palindrome (8898338988).

The spelling of 2161307376 in words is "two billion, one hundred sixty-one million, three hundred seven thousand, three hundred seventy-six".