1691912180157 has 8 divisors (see below), whose sum is σ = 2255889749376. Its totient is φ = 1127938032192.

The previous prime is 1691912180149. The next prime is 1691912180183. The reversal of 1691912180157 is 7510812191961.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1691912180157 - 2³ = 1691912180149 is a prime.

It is a super-2 number, since 2×1691912180157² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1691912182157) by changing a digit.

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, 705468 + ... + 1970154.

It is an arithmetic number, because the mean of its divisors is an integer number (281986218672).

Almost surely, 2^{1691912180157} is an apocalyptic number.

It is an amenable number.

1691912180157 is a deficient number, since it is larger than the sum of its proper divisors (563977569219).

1691912180157 is a wasteful number, since it uses less digits than its factorization.

1691912180157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1710627.

The product of its (nonzero) digits is 272160, while the sum is 51.

The spelling of 1691912180157 in words is "one trillion, six hundred ninety-one billion, nine hundred twelve million, one hundred eighty thousand, one hundred fifty-seven".