2152779345 has 72 divisors (see below), whose sum is σ = 3918552768. Its totient is φ = 1093055040.

The previous prime is 2152779311. The next prime is 2152779373. The reversal of 2152779345 is 5439772512.

It is a happy number.

2152779345 is a `hidden beast` number, since 21 + 527 + 79 + 34 + 5 = 666.

It is not a de Polignac number, because 2152779345 - 2⁸ = 2152779089 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 2152779345.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 2897044 + ... + 2897786.

It is an arithmetic number, because the mean of its divisors is an integer number (54424344).

Almost surely, 2^2152779345 is an apocalyptic number.

It is an amenable number.

2152779345 is a deficient number, since it is larger than the sum of its proper divisors (1765773423).

2152779345 is a wasteful number, since it uses less digits than its factorization.

2152779345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 883 (or 849 counting only the distinct ones).

The product of its digits is 529200, while the sum is 45.

The square root of 2152779345 is about 46398.0532457990. The cubic root of 2152779345 is about 1291.2187958349.

The spelling of 2152779345 in words is "two billion, one hundred fifty-two million, seven hundred seventy-nine thousand, three hundred forty-five".