1687612517074 has 24 divisors (see below), whose sum is σ = 2853503595504. Its totient is φ = 742351537800.

The previous prime is 1687612517069. The next prime is 1687612517077. The reversal of 1687612517074 is 4707152167861.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1687612517077) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39890232 + ... + 39932515.

It is an arithmetic number, because the mean of its divisors is an integer number (118895983146).

Almost surely, 2^{1687612517074} is an apocalyptic number.

1687612517074 is a deficient number, since it is larger than the sum of its proper divisors (1165891078430).

1687612517074 is a wasteful number, since it uses less digits than its factorization.

1687612517074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79822822 (or 79822791 counting only the distinct ones).

The product of its (nonzero) digits is 3951360, while the sum is 55.

The spelling of 1687612517074 in words is "one trillion, six hundred eighty-seven billion, six hundred twelve million, five hundred seventeen thousand, seventy-four".