1625714641 has 4 divisors (see below), whose sum is σ = 1721344932. Its totient is φ = 1530084352.

The previous prime is 1625714639. The next prime is 1625714653. The reversal of 1625714641 is 1464175261.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1464175261 = 1123 ⋅1303807.

It can be written as a sum of positive squares in 2 ways, for example, as 550137025 + 1075577616 = 23455^2 + 32796^2 .

It is a cyclic number.

It is not a de Polignac number, because 1625714641 - 2¹ = 1625714639 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1625714641.

It is not an unprimeable number, because it can be changed into a prime (1625714341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47815120 + ... + 47815153.

It is an arithmetic number, because the mean of its divisors is an integer number (430336233).

Almost surely, 2^1625714641 is an apocalyptic number.

It is an amenable number.

1625714641 is a deficient number, since it is larger than the sum of its proper divisors (95630291).

1625714641 is an equidigital number, since it uses as much as digits as its factorization.

1625714641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95630290.

The product of its digits is 40320, while the sum is 37.

The square root of 1625714641 is about 40320.1517978293. The cubic root of 1625714641 is about 1175.8396632351.

The spelling of 1625714641 in words is "one billion, six hundred twenty-five million, seven hundred fourteen thousand, six hundred forty-one".