2156764896 has 144 divisors (see below), whose sum is σ = 7205693040. Its totient is φ = 603279360.

The previous prime is 2156764871. The next prime is 2156764913. The reversal of 2156764896 is 6984676512.

2156764896 is a `hidden beast` number, since 2 + 156 + 7 + 6 + 489 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15000 + ... + 67368.

It is an arithmetic number, because the mean of its divisors is an integer number (50039535).

Almost surely, 2^2156764896 is an apocalyptic number.

2156764896 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2156764896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3602846520).

2156764896 is an abundant number, since it is smaller than the sum of its proper divisors (5048928144).

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

2156764896 is a wasteful number, since it uses less digits than its factorization.

2156764896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52409 (or 52398 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 54.

The square root of 2156764896 is about 46440.9829353342. The cubic root of 2156764896 is about 1292.0151378316.

The spelling of 2156764896 in words is "two billion, one hundred fifty-six million, seven hundred sixty-four thousand, eight hundred ninety-six".