745565551 has 2 divisors, whose sum is σ = 745565552. Its totient is φ = 745565550.

The previous prime is 745565507. The next prime is 745565563. The reversal of 745565551 is 155565547.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 745565551 - 2²⁷ = 611347823 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 745565498 and 745565507.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (745563551) 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, 372782775 + 372782776.

It is an arithmetic number, because the mean of its divisors is an integer number (372782776).

Almost surely, 2^745565551 is an apocalyptic number.

745565551 is a deficient number, since it is larger than the sum of its proper divisors (1).

745565551 is an equidigital number, since it uses as much as digits as its factorization.

745565551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 525000, while the sum is 43.

The square root of 745565551 is about 27305.0462552254. The cubic root of 745565551 is about 906.7661048455.

The spelling of 745565551 in words is "seven hundred forty-five million, five hundred sixty-five thousand, five hundred fifty-one".