685150520 has 32 divisors (see below), whose sum is σ = 1594749600. Its totient is φ = 264609408.

The previous prime is 685150517. The next prime is 685150523. The reversal of 685150520 is 25051586.

It is an interprime number because it is at equal distance from previous prime (685150517) and next prime (685150523).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685150523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 294164 + ... + 296483.

It is an arithmetic number, because the mean of its divisors is an integer number (49835925).

Almost surely, 2^685150520 is an apocalyptic number.

It is an amenable number.

685150520 is an abundant number, since it is smaller than the sum of its proper divisors (909599080).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

685150520 is a wasteful number, since it uses less digits than its factorization.

685150520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 590687 (or 590683 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 32.

The square root of 685150520 is about 26175.3800354455. The cubic root of 685150520 is about 881.5805445129.

The spelling of 685150520 in words is "six hundred eighty-five million, one hundred fifty thousand, five hundred twenty".