685374555 has 16 divisors (see below), whose sum is σ = 1154315520. Its totient is φ = 346294368.

The previous prime is 685374541. The next prime is 685374559. The reversal of 685374555 is 555473586.

It is not a de Polignac number, because 685374555 - 2⁵ = 685374523 is a prime.

It is not an unprimeable number, because it can be changed into a prime (685374559) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1202127 + ... + 1202696.

It is an arithmetic number, because the mean of its divisors is an integer number (72144720).

Almost surely, 2^685374555 is an apocalyptic number.

685374555 is a deficient number, since it is larger than the sum of its proper divisors (468940965).

685374555 is a wasteful number, since it uses less digits than its factorization.

685374555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2404850.

The product of its digits is 2520000, while the sum is 48.

The square root of 685374555 is about 26179.6591841834. The cubic root of 685374555 is about 881.6766223665.

The spelling of 685374555 in words is "six hundred eighty-five million, three hundred seventy-four thousand, five hundred fifty-five".