4727991551 has 2 divisors, whose sum is σ = 4727991552. Its totient is φ = 4727991550.

The previous prime is 4727991509. The next prime is 4727991571. The reversal of 4727991551 is 1551997274.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4727991551 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4727991551.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4727991571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2363995775 + 2363995776.

It is an arithmetic number, because the mean of its divisors is an integer number (2363995776).

Almost surely, 2^4727991551 is an apocalyptic number.

4727991551 is a deficient number, since it is larger than the sum of its proper divisors (1).

4727991551 is an equidigital number, since it uses as much as digits as its factorization.

4727991551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 793800, while the sum is 50.

The square root of 4727991551 is about 68760.3923127261. The cubic root of 4727991551 is about 1678.3874775653.

The spelling of 4727991551 in words is "four billion, seven hundred twenty-seven million, nine hundred ninety-one thousand, five hundred fifty-one".