1572720672493 has 2 divisors, whose sum is σ = 1572720672494. Its totient is φ = 1572720672492.

The previous prime is 1572720672487. The next prime is 1572720672511. The reversal of 1572720672493 is 3942760272751.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1513719290889 + 59001381604 = 1230333^2 + 242902^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1572720672493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1572720672293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 786360336246 + 786360336247.

It is an arithmetic number, because the mean of its divisors is an integer number (786360336247).

Almost surely, 2^{1572720672493} is an apocalyptic number.

It is an amenable number.

1572720672493 is a deficient number, since it is larger than the sum of its proper divisors (1).

1572720672493 is an equidigital number, since it uses as much as digits as its factorization.

1572720672493 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8890560, while the sum is 55.

The spelling of 1572720672493 in words is "one trillion, five hundred seventy-two billion, seven hundred twenty million, six hundred seventy-two thousand, four hundred ninety-three".