2759905649 has 2 divisors, whose sum is σ = 2759905650. Its totient is φ = 2759905648.

The previous prime is 2759905583. The next prime is 2759905657. The reversal of 2759905649 is 9465099572.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2540865649 + 219040000 = 50407^2 + 14800^2 .

It is a cyclic number.

It is not a de Polignac number, because 2759905649 - 2¹² = 2759901553 is a prime.

It is a super-2 number, since 2×2759905649² = 15234158382764222402, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2759905594 and 2759905603.

It is not a weakly prime, because it can be changed into another prime (2759905349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1379952824 + 1379952825.

It is an arithmetic number, because the mean of its divisors is an integer number (1379952825).

Almost surely, 2^2759905649 is an apocalyptic number.

It is an amenable number.

2759905649 is a deficient number, since it is larger than the sum of its proper divisors (1).

2759905649 is an equidigital number, since it uses as much as digits as its factorization.

2759905649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6123600, while the sum is 56.

The square root of 2759905649 is about 52534.8041682845. The cubic root of 2759905649 is about 1402.6998325033.

The spelling of 2759905649 in words is "two billion, seven hundred fifty-nine million, nine hundred five thousand, six hundred forty-nine".