1625885261 has 32 divisors (see below), whose sum is σ = 2258323200. Its totient is φ = 1129121280.

The previous prime is 1625885237. The next prime is 1625885263.

1625885261 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 1625885261 - 2¹⁴ = 1625868877 is a prime.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1625885263) 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 31 ways as a sum of consecutive naturals, for example, 1025 + ... + 57033.

It is an arithmetic number, because the mean of its divisors is an integer number (70572600).

Almost surely, 2^1625885261 is an apocalyptic number.

1625885261 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1625885261 is a deficient number, since it is larger than the sum of its proper divisors (632437939).

1625885261 is a wasteful number, since it uses less digits than its factorization.

1625885261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56069.

The product of its digits is 230400, while the sum is 44.

The square root of 1625885261 is about 40322.2675577652. The cubic root of 1625885261 is about 1175.8807968880.

The spelling of 1625885261 in words is "one billion, six hundred twenty-five million, eight hundred eighty-five thousand, two hundred sixty-one".