1685557332 has 18 divisors (see below), whose sum is σ = 4260714458. Its totient is φ = 561852432.

The previous prime is 1685557331. The next prime is 1685557333. The reversal of 1685557332 is 2337555861.

1685557332 is a `hidden beast` number, since 1 + 68 + 5 + 557 + 3 + 32 = 666.

It is an interprime number because it is at equal distance from previous prime (1685557331) and next prime (1685557333).

It can be written as a sum of positive squares in only one way, i.e., 1458934416 + 226622916 = 38196^2 + 15054^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×1685557332² = 5682207038917916448, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1685557331) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 23410483 + ... + 23410554.

Almost surely, 2^1685557332 is an apocalyptic number.

1685557332 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1685557332 is an abundant number, since it is smaller than the sum of its proper divisors (2575157126).

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

1685557332 is a wasteful number, since it uses less digits than its factorization.

1685557332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46821047 (or 46821042 counting only the distinct ones).

The product of its digits is 756000, while the sum is 45.

The square root of 1685557332 is about 41055.5396018613. The cubic root of 1685557332 is about 1190.0937552947.

The spelling of 1685557332 in words is "one billion, six hundred eighty-five million, five hundred fifty-seven thousand, three hundred thirty-two".