2129777604 has 24 divisors (see below), whose sum is σ = 5521645920. Its totient is φ = 709925832.

The previous prime is 2129777567. The next prime is 2129777627. The reversal of 2129777604 is 4067779212.

It is a self number, because there is not a number n which added to its sum of digits gives 2129777604.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9859974 + ... + 9860189.

It is an arithmetic number, because the mean of its divisors is an integer number (230068580).

Almost surely, 2^2129777604 is an apocalyptic number.

It is an amenable number.

2129777604 is an abundant number, since it is smaller than the sum of its proper divisors (3391868316).

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

2129777604 is a wasteful number, since it uses less digits than its factorization.

2129777604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19720176 (or 19720168 counting only the distinct ones).

The product of its (nonzero) digits is 296352, while the sum is 45.

The square root of 2129777604 is about 46149.5135835688. The cubic root of 2129777604 is about 1286.6035694700.

The spelling of 2129777604 in words is "two billion, one hundred twenty-nine million, seven hundred seventy-seven thousand, six hundred four".