1721607547053 has 4 divisors (see below), whose sum is σ = 2295476729408. Its totient is φ = 1147738364700.

The previous prime is 1721607547019. The next prime is 1721607547069. The reversal of 1721607547053 is 3507457061271.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1721607547053 - 2¹⁸ = 1721607284909 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1721607546993 and 1721607547011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1721607547453) 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, 286934591173 + ... + 286934591178.

It is an arithmetic number, because the mean of its divisors is an integer number (573869182352).

Almost surely, 2^{1721607547053} is an apocalyptic number.

It is an amenable number.

1721607547053 is a deficient number, since it is larger than the sum of its proper divisors (573869182355).

1721607547053 is an equidigital number, since it uses as much as digits as its factorization.

1721607547053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 573869182354.

The product of its (nonzero) digits is 1234800, while the sum is 48.

The spelling of 1721607547053 in words is "one trillion, seven hundred twenty-one billion, six hundred seven million, five hundred forty-seven thousand, fifty-three".