2649418157 has 2 divisors, whose sum is σ = 2649418158. Its totient is φ = 2649418156.

The previous prime is 2649418151. The next prime is 2649418169. The reversal of 2649418157 is 7518149462.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2634871561 + 14546596 = 51331^2 + 3814^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2649418157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2649418151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1324709078 + 1324709079.

It is an arithmetic number, because the mean of its divisors is an integer number (1324709079).

Almost surely, 2^2649418157 is an apocalyptic number.

It is an amenable number.

2649418157 is a deficient number, since it is larger than the sum of its proper divisors (1).

2649418157 is an equidigital number, since it uses as much as digits as its factorization.

2649418157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 483840, while the sum is 47.

The square root of 2649418157 is about 51472.4990358929. The cubic root of 2649418157 is about 1383.7262169423.

The spelling of 2649418157 in words is "two billion, six hundred forty-nine million, four hundred eighteen thousand, one hundred fifty-seven".