1689921157237 has 8 divisors (see below), whose sum is σ = 1748337366240. Its totient is φ = 1631514486000.

The previous prime is 1689921157207. The next prime is 1689921157277. The reversal of 1689921157237 is 7327511299861.

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

It is a cyclic number.

It is not a de Polignac number, because 1689921157237 - 2¹¹ = 1689921155189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1689921157207) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2023023 + ... + 2733580.

It is an arithmetic number, because the mean of its divisors is an integer number (218542170780).

Almost surely, 2^{1689921157237} is an apocalyptic number.

It is an amenable number.

1689921157237 is a deficient number, since it is larger than the sum of its proper divisors (58416209003).

1689921157237 is a wasteful number, since it uses less digits than its factorization.

1689921157237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4768883.

The product of its digits is 11430720, while the sum is 61.

The spelling of 1689921157237 in words is "one trillion, six hundred eighty-nine billion, nine hundred twenty-one million, one hundred fifty-seven thousand, two hundred thirty-seven".