1606436625 has 64 divisors (see below), whose sum is σ = 2748784896. Its totient is φ = 832832000.

The previous prime is 1606436609. The next prime is 1606436669. The reversal of 1606436625 is 5266346061.

It is not a de Polignac number, because 1606436625 - 2⁴ = 1606436609 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2603317 + ... + 2603933.

It is an arithmetic number, because the mean of its divisors is an integer number (42949764).

Almost surely, 2^1606436625 is an apocalyptic number.

1606436625 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1606436625 is a deficient number, since it is larger than the sum of its proper divisors (1142348271).

1606436625 is a wasteful number, since it uses less digits than its factorization.

1606436625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 819 (or 809 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 39.

The square root of 1606436625 is about 40080.3770566096. The cubic root of 1606436625 is about 1171.1733972780.

It can be divided in two parts, 1606436 and 625, that added together give a palindrome (1607061).

The spelling of 1606436625 in words is "one billion, six hundred six million, four hundred thirty-six thousand, six hundred twenty-five".