1625617145 has 16 divisors (see below), whose sum is σ = 1972623360. Its totient is φ = 1285974144.

The previous prime is 1625617117. The next prime is 1625617151. The reversal of 1625617145 is 5417165261.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1625617145 is a prime.

It is a super-2 number, since 2×1625617145² = 5285262204235902050, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1625617099 and 1625617108.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 194666 + ... + 202844.

It is an arithmetic number, because the mean of its divisors is an integer number (123288960).

Almost surely, 2^1625617145 is an apocalyptic number.

It is an amenable number.

1625617145 is a deficient number, since it is larger than the sum of its proper divisors (347006215).

1625617145 is a wasteful number, since it uses less digits than its factorization.

1625617145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8624.

The product of its digits is 50400, while the sum is 38.

The square root of 1625617145 is about 40318.9427564761. The cubic root of 1625617145 is about 1175.8161572740.

The spelling of 1625617145 in words is "one billion, six hundred twenty-five million, six hundred seventeen thousand, one hundred forty-five".