1720628371051 has 8 divisors (see below), whose sum is σ = 1735925676224. Its totient is φ = 1705396861440.

The previous prime is 1720628371027. The next prime is 1720628371057. The reversal of 1720628371051 is 1501738260271.

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 1720628371051 - 2²³ = 1720619982443 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1720628370989 and 1720628371007.

It is not an unprimeable number, because it can be changed into a prime (1720628371057) 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, 16396356 + ... + 16500961.

It is an arithmetic number, because the mean of its divisors is an integer number (216990709528).

Almost surely, 2^{1720628371051} is an apocalyptic number.

1720628371051 is a deficient number, since it is larger than the sum of its proper divisors (15297305173).

1720628371051 is a wasteful number, since it uses less digits than its factorization.

1720628371051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32897781.

The product of its (nonzero) digits is 141120, while the sum is 43.

The spelling of 1720628371051 in words is "one trillion, seven hundred twenty billion, six hundred twenty-eight million, three hundred seventy-one thousand, fifty-one".