5651663291 has 2 divisors, whose sum is σ = 5651663292. Its totient is φ = 5651663290.

The previous prime is 5651663257. The next prime is 5651663377. The reversal of 5651663291 is 1923661565.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5651663291 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (5651660291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2825831645 + 2825831646.

It is an arithmetic number, because the mean of its divisors is an integer number (2825831646).

Almost surely, 2^5651663291 is an apocalyptic number.

5651663291 is a deficient number, since it is larger than the sum of its proper divisors (1).

5651663291 is an equidigital number, since it uses as much as digits as its factorization.

5651663291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 291600, while the sum is 44.

The square root of 5651663291 is about 75177.5451248576. The cubic root of 5651663291 is about 1781.2522529964.

The spelling of 5651663291 in words is "five billion, six hundred fifty-one million, six hundred sixty-three thousand, two hundred ninety-one".