2129556454 has 4 divisors (see below), whose sum is σ = 3194334684. Its totient is φ = 1064778226.

The previous prime is 2129556437. The next prime is 2129556487. The reversal of 2129556454 is 4546559212.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 2129556454.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 532389112 + ... + 532389115.

It is an arithmetic number, because the mean of its divisors is an integer number (798583671).

Almost surely, 2^2129556454 is an apocalyptic number.

2129556454 is a deficient number, since it is larger than the sum of its proper divisors (1064778230).

2129556454 is a wasteful number, since it uses less digits than its factorization.

2129556454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1064778229.

The product of its digits is 432000, while the sum is 43.

The square root of 2129556454 is about 46147.1175047803. The cubic root of 2129556454 is about 1286.5590355200.

It can be divided in two parts, 212955645 and 4, that added together give a square (212955649 = 14593²).

The spelling of 2129556454 in words is "two billion, one hundred twenty-nine million, five hundred fifty-six thousand, four hundred fifty-four".