745578643 has 2 divisors, whose sum is σ = 745578644. Its totient is φ = 745578642.

The previous prime is 745578629. The next prime is 745578653. The reversal of 745578643 is 346875547.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 745578643 - 2²¹ = 743481491 is a prime.

It is not a weakly prime, because it can be changed into another prime (745578653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 372789321 + 372789322.

It is an arithmetic number, because the mean of its divisors is an integer number (372789322).

Almost surely, 2^745578643 is an apocalyptic number.

745578643 is a deficient number, since it is larger than the sum of its proper divisors (1).

745578643 is an equidigital number, since it uses as much as digits as its factorization.

745578643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2822400, while the sum is 49.

The square root of 745578643 is about 27305.2859900789. The cubic root of 745578643 is about 906.7714123656.

The spelling of 745578643 in words is "seven hundred forty-five million, five hundred seventy-eight thousand, six hundred forty-three".