2155455406 has 24 divisors (see below), whose sum is σ = 3518901144. Its totient is φ = 989745120.

The previous prime is 2155455397. The next prime is 2155455413. The reversal of 2155455406 is 6045545512.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 50401 + ... + 82771.

It is an arithmetic number, because the mean of its divisors is an integer number (146620881).

Almost surely, 2^2155455406 is an apocalyptic number.

2155455406 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

2155455406 is a deficient number, since it is larger than the sum of its proper divisors (1363445738).

2155455406 is a wasteful number, since it uses less digits than its factorization.

2155455406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32596 (or 32583 counting only the distinct ones).

The product of its (nonzero) digits is 120000, while the sum is 37.

The square root of 2155455406 is about 46426.8823635617. The cubic root of 2155455406 is about 1291.7536005274.

The spelling of 2155455406 in words is "two billion, one hundred fifty-five million, four hundred fifty-five thousand, four hundred six".