745212279523 has 4 divisors (see below), whose sum is σ = 748554038848. Its totient is φ = 741870520200.

The previous prime is 745212279457. The next prime is 745212279533. The reversal of 745212279523 is 325972212547.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 745212279523 - 2¹⁷ = 745212148451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (745212279533) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1670879328 + ... + 1670879773.

It is an arithmetic number, because the mean of its divisors is an integer number (187138509712).

Almost surely, 2^745212279523 is an apocalyptic number.

745212279523 is a deficient number, since it is larger than the sum of its proper divisors (3341759325).

745212279523 is a wasteful number, since it uses less digits than its factorization.

745212279523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3341759324.

The product of its digits is 2116800, while the sum is 49.

The spelling of 745212279523 in words is "seven hundred forty-five billion, two hundred twelve million, two hundred seventy-nine thousand, five hundred twenty-three".