685570056445 has 16 divisors (see below), whose sum is σ = 826648704000. Its totient is φ = 545815113408.

The previous prime is 685570056439. The next prime is 685570056461. The reversal of 685570056445 is 544650075586.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-685570056445 is a prime.

It is a congruent number.

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, 2429946 + ... + 2697364.

It is an arithmetic number, because the mean of its divisors is an integer number (51665544000).

Almost surely, 2^685570056445 is an apocalyptic number.

It is an amenable number.

685570056445 is a deficient number, since it is larger than the sum of its proper divisors (141078647555).

685570056445 is a wasteful number, since it uses less digits than its factorization.

685570056445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269892.

The product of its (nonzero) digits is 20160000, while the sum is 55.

The spelling of 685570056445 in words is "six hundred eighty-five billion, five hundred seventy million, fifty-six thousand, four hundred forty-five".