2155643463400 has 48 divisors (see below), whose sum is σ = 5727852635040. Its totient is φ = 739077758400.

The previous prime is 2155643463377. The next prime is 2155643463403. The reversal of 2155643463400 is 43643465512.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (2155643463403) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 769871266 + ... + 769874065.

It is an arithmetic number, because the mean of its divisors is an integer number (119330263230).

Almost surely, 2^{2155643463400} is an apocalyptic number.

2155643463400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2155643463400 is an abundant number, since it is smaller than the sum of its proper divisors (3572209171640).

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

2155643463400 is a wasteful number, since it uses less digits than its factorization.

2155643463400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1539745354 (or 1539745345 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 43.

The spelling of 2155643463400 in words is "two trillion, one hundred fifty-five billion, six hundred forty-three million, four hundred sixty-three thousand, four hundred".