1601736725 has 6 divisors (see below), whose sum is σ = 1986153570. Its totient is φ = 1281389360.

The previous prime is 1601736667. The next prime is 1601736749. The reversal of 1601736725 is 5276371061.

It can be written as a sum of positive squares in 3 ways, for example, as 25170289 + 1576566436 = 5017^2 + 39706^2 .

It is not a de Polignac number, because 1601736725 - 2²⁰ = 1600688149 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 32034710 + ... + 32034759.

It is an arithmetic number, because the mean of its divisors is an integer number (331025595).

Almost surely, 2^1601736725 is an apocalyptic number.

It is an amenable number.

1601736725 is a deficient number, since it is larger than the sum of its proper divisors (384416845).

1601736725 is an equidigital number, since it uses as much as digits as its factorization.

1601736725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64069479 (or 64069474 counting only the distinct ones).

The product of its (nonzero) digits is 52920, while the sum is 38.

The square root of 1601736725 is about 40021.7031746526. The cubic root of 1601736725 is about 1170.0301268206.

The spelling of 1601736725 in words is "one billion, six hundred one million, seven hundred thirty-six thousand, seven hundred twenty-five".