1685604642552 has 64 divisors (see below), whose sum is σ = 4684661049600. Its totient is φ = 561577102560.

The previous prime is 1685604642529. The next prime is 1685604642559. The reversal of 1685604642552 is 2552464065861.

1685604642552 is a `hidden beast` number, since 1 + 6 + 8 + 5 + 6 + 0 + 46 + 42 + 552 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1685604642559) 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, 1603548 + ... + 2437739.

It is an arithmetic number, because the mean of its divisors is an integer number (73197828900).

Almost surely, 2^{1685604642552} is an apocalyptic number.

1685604642552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1685604642552 is an abundant number, since it is smaller than the sum of its proper divisors (2999056407048).

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

1685604642552 is a wasteful number, since it uses less digits than its factorization.

1685604642552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4043233 (or 4043223 counting only the distinct ones).

The product of its (nonzero) digits is 13824000, while the sum is 54.

The spelling of 1685604642552 in words is "one trillion, six hundred eighty-five billion, six hundred four million, six hundred forty-two thousand, five hundred fifty-two".