1677997343521 has 8 divisors (see below), whose sum is σ = 1773893740320. Its totient is φ = 1582859021472.

The previous prime is 1677997343507. The next prime is 1677997343531. The reversal of 1677997343521 is 1253437997761.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1677997343521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1677997343531) 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, 189514135 + ... + 189522988.

It is an arithmetic number, because the mean of its divisors is an integer number (221736717540).

Almost surely, 2^{1677997343521} is an apocalyptic number.

It is an amenable number.

1677997343521 is a deficient number, since it is larger than the sum of its proper divisors (95896396799).

1677997343521 is a wasteful number, since it uses less digits than its factorization.

1677997343521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379037375.

The product of its digits is 60011280, while the sum is 64.

The spelling of 1677997343521 in words is "one trillion, six hundred seventy-seven billion, nine hundred ninety-seven million, three hundred forty-three thousand, five hundred twenty-one".