1726725761 has 6 divisors (see below), whose sum is σ = 1784224386. Its totient is φ = 1671024000.

The previous prime is 1726725733. The next prime is 1726725773. The reversal of 1726725761 is 1675276271.

It can be written as a sum of positive squares in only one way, i.e., 1007681536 + 719044225 = 31744^2 + 26815^2 .

It is not a de Polignac number, because 1726725761 - 2¹⁸ = 1726463617 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1726725061) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 897440 + ... + 899361.

It is an arithmetic number, because the mean of its divisors is an integer number (297370731).

Almost surely, 2^1726725761 is an apocalyptic number.

It is an amenable number.

1726725761 is a deficient number, since it is larger than the sum of its proper divisors (57498625).

1726725761 is an equidigital number, since it uses as much as digits as its factorization.

1726725761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1796863 (or 1796832 counting only the distinct ones).

The product of its digits is 246960, while the sum is 44.

The square root of 1726725761 is about 41553.8898419871. The cubic root of 1726725761 is about 1199.7049647363.

The spelling of 1726725761 in words is "one billion, seven hundred twenty-six million, seven hundred twenty-five thousand, seven hundred sixty-one".