1625401611 has 12 divisors (see below), whose sum is σ = 2397756192. Its totient is φ = 1060545456.

The previous prime is 1625401577. The next prime is 1625401619. The reversal of 1625401611 is 1161045261.

1625401611 is a `hidden beast` number, since 1 + 6 + 2 + 5 + 40 + 1 + 611 = 666.

It is not a de Polignac number, because 1625401611 - 2²³ = 1617013003 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1625401619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1920856 + ... + 1921701.

It is an arithmetic number, because the mean of its divisors is an integer number (199813016).

Almost surely, 2^1625401611 is an apocalyptic number.

1625401611 is a deficient number, since it is larger than the sum of its proper divisors (772354581).

1625401611 is a wasteful number, since it uses less digits than its factorization.

1625401611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3842610 (or 3842607 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 1625401611 is about 40316.2698051295. The cubic root of 1625401611 is about 1175.7641894082.

Adding to 1625401611 its reverse (1161045261), we get a palindrome (2786446872).

The spelling of 1625401611 in words is "one billion, six hundred twenty-five million, four hundred one thousand, six hundred eleven".