1651128551 has 2 divisors, whose sum is σ = 1651128552. Its totient is φ = 1651128550.

The previous prime is 1651128539. The next prime is 1651128559. The reversal of 1651128551 is 1558211561.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1651128551 - 2⁶ = 1651128487 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1651128559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 825564275 + 825564276.

It is an arithmetic number, because the mean of its divisors is an integer number (825564276).

Almost surely, 2^1651128551 is an apocalyptic number.

1651128551 is a deficient number, since it is larger than the sum of its proper divisors (1).

1651128551 is an equidigital number, since it uses as much as digits as its factorization.

1651128551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12000, while the sum is 35.

The square root of 1651128551 is about 40634.0811511716. The cubic root of 1651128551 is about 1181.9350971623.

The spelling of 1651128551 in words is "one billion, six hundred fifty-one million, one hundred twenty-eight thousand, five hundred fifty-one".