1625289128205 has 16 divisors (see below), whose sum is σ = 2684348496384. Its totient is φ = 838858904640.

The previous prime is 1625289128201. The next prime is 1625289128207. The reversal of 1625289128205 is 5028219825261.

It is a happy number.

It is not a de Polignac number, because 1625289128205 - 2² = 1625289128201 is a prime.

It is a super-2 number, since 2×1625289128205² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1625289128201) 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, 1747622254 + ... + 1747623183.

It is an arithmetic number, because the mean of its divisors is an integer number (167771781024).

Almost surely, 2^{1625289128205} is an apocalyptic number.

1625289128205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1625289128205 is a deficient number, since it is larger than the sum of its proper divisors (1059059368179).

1625289128205 is a wasteful number, since it uses less digits than its factorization.

1625289128205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3495245476.

The product of its (nonzero) digits is 1382400, while the sum is 51.

The spelling of 1625289128205 in words is "one trillion, six hundred twenty-five billion, two hundred eighty-nine million, one hundred twenty-eight thousand, two hundred five".