1625251221105 has 16 divisors (see below), whose sum is σ = 2655729656064. Its totient is φ = 848358083840.

The previous prime is 1625251221089. The next prime is 1625251221109. The reversal of 1625251221105 is 5011221525261.

It is not a de Polignac number, because 1625251221105 - 2⁴ = 1625251221089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1625251221109) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1152659736 + ... + 1152661145.

It is an arithmetic number, because the mean of its divisors is an integer number (165983103504).

Almost surely, 2^{1625251221105} is an apocalyptic number.

1625251221105 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1625251221105 is a deficient number, since it is larger than the sum of its proper divisors (1030478434959).

1625251221105 is a wasteful number, since it uses less digits than its factorization.

1625251221105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2305320936.

The product of its (nonzero) digits is 12000, while the sum is 33.

Adding to 1625251221105 its reverse (5011221525261), we get a palindrome (6636472746366).

The spelling of 1625251221105 in words is "one trillion, six hundred twenty-five billion, two hundred fifty-one million, two hundred twenty-one thousand, one hundred five".