1687812512052 has 48 divisors (see below), whose sum is σ = 3994001246592. Its totient is φ = 554637941760.

The previous prime is 1687812512051. The next prime is 1687812512069. The reversal of 1687812512052 is 2502152187861.

It is a super-2 number, since 2×1687812512052² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1687812511992 and 1687812512010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1687812512051) 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, 12317388 + ... + 12453660.

It is an arithmetic number, because the mean of its divisors is an integer number (83208359304).

Almost surely, 2^{1687812512052} is an apocalyptic number.

1687812512052 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1687812512052 is an abundant number, since it is smaller than the sum of its proper divisors (2306188734540).

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

1687812512052 is a wasteful number, since it uses less digits than its factorization.

1687812512052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150888 (or 150886 counting only the distinct ones).

The product of its (nonzero) digits is 537600, while the sum is 48.

The spelling of 1687812512052 in words is "one trillion, six hundred eighty-seven billion, eight hundred twelve million, five hundred twelve thousand, fifty-two".