2651655749 has 2 divisors, whose sum is σ = 2651655750. Its totient is φ = 2651655748.

The previous prime is 2651655737. The next prime is 2651655829. The reversal of 2651655749 is 9475561562.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2029502500 + 622153249 = 45050^2 + 24943^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2651655749 is a prime.

It is a super-2 number, since 2×2651655749² = 14062556422409502002, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2651655697 and 2651655706.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2651655719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1325827874 + 1325827875.

It is an arithmetic number, because the mean of its divisors is an integer number (1325827875).

Almost surely, 2^2651655749 is an apocalyptic number.

It is an amenable number.

2651655749 is a deficient number, since it is larger than the sum of its proper divisors (1).

2651655749 is an equidigital number, since it uses as much as digits as its factorization.

2651655749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2268000, while the sum is 50.

The square root of 2651655749 is about 51494.2302496115. The cubic root of 2651655749 is about 1384.1156538290.

The spelling of 2651655749 in words is "two billion, six hundred fifty-one million, six hundred fifty-five thousand, seven hundred forty-nine".