2155204451454 has 32 divisors (see below), whose sum is σ = 4376443737600. Its totient is φ = 707420330400.

The previous prime is 2155204451453. The next prime is 2155204451461. The reversal of 2155204451454 is 4541544025512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2155204451453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2731354 + ... + 3430845.

It is an arithmetic number, because the mean of its divisors is an integer number (136763866800).

Almost surely, 2^{2155204451454} is an apocalyptic number.

2155204451454 is an abundant number, since it is smaller than the sum of its proper divisors (2221239286146).

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

2155204451454 is a wasteful number, since it uses less digits than its factorization.

2155204451454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6163096.

The product of its (nonzero) digits is 640000, while the sum is 42.

Adding to 2155204451454 its reverse (4541544025512), we get a palindrome (6696748476966).

The spelling of 2155204451454 in words is "two trillion, one hundred fifty-five billion, two hundred four million, four hundred fifty-one thousand, four hundred fifty-four".