2156780796 has 48 divisors (see below), whose sum is σ = 5073169920. Its totient is φ = 713136960.

The previous prime is 2156780777. The next prime is 2156780807. The reversal of 2156780796 is 6970876512.

2156780796 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 1056745 + ... + 1058783.

It is an arithmetic number, because the mean of its divisors is an integer number (105691040).

Almost surely, 2^2156780796 is an apocalyptic number.

It is an amenable number.

2156780796 is an abundant number, since it is smaller than the sum of its proper divisors (2916389124).

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

2156780796 is a wasteful number, since it uses less digits than its factorization.

2156780796 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2714 (or 2712 counting only the distinct ones).

The product of its (nonzero) digits is 1270080, while the sum is 51.

The square root of 2156780796 is about 46441.1541200259. The cubic root of 2156780796 is about 1292.0183128014.

The spelling of 2156780796 in words is "two billion, one hundred fifty-six million, seven hundred eighty thousand, seven hundred ninety-six".