1630745551 has 2 divisors, whose sum is σ = 1630745552. Its totient is φ = 1630745550.

The previous prime is 1630745533. The next prime is 1630745561. The reversal of 1630745551 is 1555470361.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1630745551 - 2²⁵ = 1597191119 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1630745551.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1630745531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 815372775 + 815372776.

It is an arithmetic number, because the mean of its divisors is an integer number (815372776).

Almost surely, 2^1630745551 is an apocalyptic number.

1630745551 is a deficient number, since it is larger than the sum of its proper divisors (1).

1630745551 is an equidigital number, since it uses as much as digits as its factorization.

1630745551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 63000, while the sum is 37.

The square root of 1630745551 is about 40382.4906487948. The cubic root of 1630745551 is about 1177.0513256413.

The spelling of 1630745551 in words is "one billion, six hundred thirty million, seven hundred forty-five thousand, five hundred fifty-one".