2125485779 has 4 divisors (see below), whose sum is σ = 2125638984. Its totient is φ = 2125332576.

The previous prime is 2125485773. The next prime is 2125485833. The reversal of 2125485779 is 9775845212.

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

It is a cyclic number.

It is not a de Polignac number, because 2125485779 - 2¹⁶ = 2125420243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2125485773) 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, 53462 + ... + 84315.

It is an arithmetic number, because the mean of its divisors is an integer number (531409746).

Almost surely, 2^2125485779 is an apocalyptic number.

2125485779 is a deficient number, since it is larger than the sum of its proper divisors (153205).

2125485779 is a wasteful number, since it uses less digits than its factorization.

2125485779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153204.

The product of its digits is 1411200, while the sum is 50.

The square root of 2125485779 is about 46102.9909984157. The cubic root of 2125485779 is about 1285.7387545002.

The spelling of 2125485779 in words is "two billion, one hundred twenty-five million, four hundred eighty-five thousand, seven hundred seventy-nine".