2156406160 has 40 divisors (see below), whose sum is σ = 5021375040. Its totient is φ = 861232512.

The previous prime is 2156406143. The next prime is 2156406179. The reversal of 2156406160 is 616046512.

It is a tau number, because it is divible by the number of its divisors (40).

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, 32269 + ... + 73171.

It is an arithmetic number, because the mean of its divisors is an integer number (125534376).

Almost surely, 2^2156406160 is an apocalyptic number.

2156406160 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2156406160 is an abundant number, since it is smaller than the sum of its proper divisors (2864968880).

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

2156406160 is a wasteful number, since it uses less digits than its factorization.

2156406160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41575 (or 41569 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 2156406160 is about 46437.1204964304. The cubic root of 2156406160 is about 1291.9434999750.

The spelling of 2156406160 in words is "two billion, one hundred fifty-six million, four hundred six thousand, one hundred sixty".