679445545 has 16 divisors (see below), whose sum is σ = 863913600. Its totient is φ = 511216384.

The previous prime is 679445497. The next prime is 679445551. The reversal of 679445545 is 545544976.

It is not a de Polignac number, because 679445545 - 2⁹ = 679445033 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 204306 + ... + 207604.

It is an arithmetic number, because the mean of its divisors is an integer number (53994600).

Almost surely, 2^679445545 is an apocalyptic number.

It is an amenable number.

679445545 is a deficient number, since it is larger than the sum of its proper divisors (184468055).

679445545 is a wasteful number, since it uses less digits than its factorization.

679445545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5744.

The product of its digits is 3024000, while the sum is 49.

The square root of 679445545 is about 26066.1762635029. The cubic root of 679445545 is about 879.1268651099.

It can be divided in two parts, 679 and 445545, that added together give a square (446224 = 668²).

The spelling of 679445545 in words is "six hundred seventy-nine million, four hundred forty-five thousand, five hundred forty-five".