2649930557 has 4 divisors (see below), whose sum is σ = 2653023516. Its totient is φ = 2646837600.

The previous prime is 2649930541. The next prime is 2649930571. The reversal of 2649930557 is 7550399462.

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: 7550399462 = 2 ⋅3775199731.

It can be written as a sum of positive squares in 2 ways, for example, as 1858127236 + 791803321 = 43106^2 + 28139^2 .

It is a cyclic number.

It is not a de Polignac number, because 2649930557 - 2⁴ = 2649930541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2649930527) 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, 1545194 + ... + 1546907.

It is an arithmetic number, because the mean of its divisors is an integer number (663255879).

Almost surely, 2^2649930557 is an apocalyptic number.

It is an amenable number.

2649930557 is a deficient number, since it is larger than the sum of its proper divisors (3092959).

2649930557 is an equidigital number, since it uses as much as digits as its factorization.

2649930557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3092958.

The product of its (nonzero) digits is 2041200, while the sum is 50.

The square root of 2649930557 is about 51477.4762104748. The cubic root of 2649930557 is about 1383.8154158491.

The spelling of 2649930557 in words is "two billion, six hundred forty-nine million, nine hundred thirty thousand, five hundred fifty-seven".