1687212145653 has 32 divisors (see below), whose sum is σ = 2353939249152. Its totient is φ = 1072919390400.

The previous prime is 1687212145639. The next prime is 1687212145681. The reversal of 1687212145653 is 3565412127861.

It is not a de Polignac number, because 1687212145653 - 2¹⁶ = 1687212080117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1687212145596 and 1687212145605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1687212145153) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 203005368 + ... + 203013678.

It is an arithmetic number, because the mean of its divisors is an integer number (73560601536).

Almost surely, 2^{1687212145653} is an apocalyptic number.

It is an amenable number.

1687212145653 is a deficient number, since it is larger than the sum of its proper divisors (666727103499).

1687212145653 is a wasteful number, since it uses less digits than its factorization.

1687212145653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16145.

The product of its digits is 2419200, while the sum is 51.

The spelling of 1687212145653 in words is "one trillion, six hundred eighty-seven billion, two hundred twelve million, one hundred forty-five thousand, six hundred fifty-three".