2128629481 has 4 divisors (see below), whose sum is σ = 2322141264. Its totient is φ = 1935117700.

The previous prime is 2128629443. The next prime is 2128629509. The reversal of 2128629481 is 1849268212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2128629481 - 2⁹ = 2128628969 is a prime.

It is a super-2 number, since 2×2128629481² = 9062126934764658722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2128629781) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96755875 + ... + 96755896.

It is an arithmetic number, because the mean of its divisors is an integer number (580535316).

Almost surely, 2^2128629481 is an apocalyptic number.

It is an amenable number.

2128629481 is a deficient number, since it is larger than the sum of its proper divisors (193511783).

2128629481 is a wasteful number, since it uses less digits than its factorization.

2128629481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193511782.

The product of its digits is 110592, while the sum is 43.

The square root of 2128629481 is about 46137.0727398260. The cubic root of 2128629481 is about 1286.3723333280.

The spelling of 2128629481 in words is "two billion, one hundred twenty-eight million, six hundred twenty-nine thousand, four hundred eighty-one".