1651716551 has 2 divisors, whose sum is σ = 1651716552. Its totient is φ = 1651716550.

The previous prime is 1651716511. The next prime is 1651716571. The reversal of 1651716551 is 1556171561.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1651716551 is a prime.

It is a Sophie Germain prime.

It is a pancake number, because a pancake can be divided into 1651716551 parts by 57475 straight cuts.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1651716511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 825858275 + 825858276.

It is an arithmetic number, because the mean of its divisors is an integer number (825858276).

Almost surely, 2^1651716551 is an apocalyptic number.

1651716551 is a deficient number, since it is larger than the sum of its proper divisors (1).

1651716551 is an equidigital number, since it uses as much as digits as its factorization.

1651716551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31500, while the sum is 38.

The square root of 1651716551 is about 40641.3158128523. The cubic root of 1651716551 is about 1182.0753841101.

The spelling of 1651716551 in words is "one billion, six hundred fifty-one million, seven hundred sixteen thousand, five hundred fifty-one".