1625464669 has 2 divisors, whose sum is σ = 1625464670. Its totient is φ = 1625464668.

The previous prime is 1625464661. The next prime is 1625464697. The reversal of 1625464669 is 9664645261.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1553384569 + 72080100 = 39413^2 + 8490^2 .

It is a cyclic number.

It is not a de Polignac number, because 1625464669 - 2³ = 1625464661 is a prime.

It is a super-2 number, since 2×1625464669² = 5284270780334559122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1625464661) 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 as a sum of consecutive naturals, namely, 812732334 + 812732335.

It is an arithmetic number, because the mean of its divisors is an integer number (812732335).

Almost surely, 2^1625464669 is an apocalyptic number.

It is an amenable number.

1625464669 is a deficient number, since it is larger than the sum of its proper divisors (1).

1625464669 is an equidigital number, since it uses as much as digits as its factorization.

1625464669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1866240, while the sum is 49.

The square root of 1625464669 is about 40317.0518391412. The cubic root of 1625464669 is about 1175.7793939334.

It can be divided in two parts, 16 and 25464669, that multiplied together give a palindrome (407434704).

The spelling of 1625464669 in words is "one billion, six hundred twenty-five million, four hundred sixty-four thousand, six hundred sixty-nine".