1685178164552 has 32 divisors (see below), whose sum is σ = 3326377641600. Its totient is φ = 798153943104.

The previous prime is 1685178164521. The next prime is 1685178164567. The reversal of 1685178164552 is 2554618715861.

It is a junction number, because it is equal to n+sod(n) for n = 1685178164491 and 1685178164500.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 774698 + ... + 1992614.

It is an arithmetic number, because the mean of its divisors is an integer number (103949301300).

Almost surely, 2^{1685178164552} is an apocalyptic number.

It is an amenable number.

1685178164552 is a deficient number, since it is larger than the sum of its proper divisors (1641199477048).

1685178164552 is a wasteful number, since it uses less digits than its factorization.

1685178164552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1227045 (or 1227041 counting only the distinct ones).

The product of its digits is 16128000, while the sum is 59.

The spelling of 1685178164552 in words is "one trillion, six hundred eighty-five billion, one hundred seventy-eight million, one hundred sixty-four thousand, five hundred fifty-two".