2129663550 has 96 divisors (see below), whose sum is σ = 6045541632. Its totient is φ = 486017280.

The previous prime is 2129663521. The next prime is 2129663563. The reversal of 2129663550 is 553669212.

It is a junction number, because it is equal to n+sod(n) for n = 2129663499 and 2129663508.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 926002 + ... + 928298.

It is an arithmetic number, because the mean of its divisors is an integer number (62974392).

Almost surely, 2^2129663550 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2129663550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3022770816).

2129663550 is an abundant number, since it is smaller than the sum of its proper divisors (3915878082).

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

2129663550 is a wasteful number, since it uses less digits than its factorization.

2129663550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3202 (or 3197 counting only the distinct ones).

The product of its (nonzero) digits is 97200, while the sum is 39.

The square root of 2129663550 is about 46148.2778660266. The cubic root of 2129663550 is about 1286.5806022984.

The spelling of 2129663550 in words is "two billion, one hundred twenty-nine million, six hundred sixty-three thousand, five hundred fifty".