2649418357 has 4 divisors (see below), whose sum is σ = 2650131820. Its totient is φ = 2648704896.

The previous prime is 2649418301. The next prime is 2649418381. The reversal of 2649418357 is 7538149462.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7538149462 = 2 ⋅3769074731.

It can be written as a sum of positive squares in 2 ways, for example, as 1844788401 + 804629956 = 42951^2 + 28366^2 .

It is a cyclic number.

It is not a de Polignac number, because 2649418357 - 2¹⁹ = 2648894069 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2649418357.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2649418157) 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, 351132 + ... + 358597.

It is an arithmetic number, because the mean of its divisors is an integer number (662532955).

Almost surely, 2^2649418357 is an apocalyptic number.

It is an amenable number.

2649418357 is a deficient number, since it is larger than the sum of its proper divisors (713463).

2649418357 is an equidigital number, since it uses as much as digits as its factorization.

2649418357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 713462.

The product of its digits is 1451520, while the sum is 49.

The square root of 2649418357 is about 51472.5009786779. The cubic root of 2649418357 is about 1383.7262517607.

The spelling of 2649418357 in words is "two billion, six hundred forty-nine million, four hundred eighteen thousand, three hundred fifty-seven".