1676721849601 has 4 divisors (see below), whose sum is σ = 1676724597972. Its totient is φ = 1676719101232.

The previous prime is 1676721849587. The next prime is 1676721849617. The reversal of 1676721849601 is 1069481276761.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 782986068225 + 893735781376 = 884865^2 + 945376^2 .

It is a cyclic number.

It is not a de Polignac number, because 1676721849601 - 2²³ = 1676713460993 is a prime.

It is a super-2 number, since 2×1676721849601² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1676721847601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3010 + ... + 1831243.

It is an arithmetic number, because the mean of its divisors is an integer number (419181149493).

Almost surely, 2^{1676721849601} is an apocalyptic number.

It is an amenable number.

1676721849601 is a deficient number, since it is larger than the sum of its proper divisors (2748371).

1676721849601 is an equidigital number, since it uses as much as digits as its factorization.

1676721849601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2748370.

The product of its (nonzero) digits is 6096384, while the sum is 58.

The spelling of 1676721849601 in words is "one trillion, six hundred seventy-six billion, seven hundred twenty-one million, eight hundred forty-nine thousand, six hundred one".