1691994536152 has 32 divisors (see below), whose sum is σ = 3339543063600. Its totient is φ = 801451857024.

The previous prime is 1691994536083. The next prime is 1691994536263. The reversal of 1691994536152 is 2516354991961.

It is a happy number.

It is a Smith number, since the sum of its digits (61) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7741038 + ... + 7956610.

Almost surely, 2^{1691994536152} is an apocalyptic number.

It is an amenable number.

1691994536152 is a deficient number, since it is larger than the sum of its proper divisors (1647548527448).

1691994536152 is a wasteful number, since it uses less digits than its factorization.

1691994536152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267235 (or 267231 counting only the distinct ones).

The product of its digits is 15746400, while the sum is 61.

The spelling of 1691994536152 in words is "one trillion, six hundred ninety-one billion, nine hundred ninety-four million, five hundred thirty-six thousand, one hundred fifty-two".