1625081655 has 8 divisors (see below), whose sum is σ = 2600130672. Its totient is φ = 866710208.

The previous prime is 1625081641. The next prime is 1625081669. The reversal of 1625081655 is 5561805261.

It is an interprime number because it is at equal distance from previous prime (1625081641) and next prime (1625081669).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1625081655 - 2¹⁰ = 1625080631 is a prime.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 54169374 + ... + 54169403.

It is an arithmetic number, because the mean of its divisors is an integer number (325016334).

Almost surely, 2^1625081655 is an apocalyptic number.

1625081655 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1625081655 is a deficient number, since it is larger than the sum of its proper divisors (975049017).

1625081655 is a wasteful number, since it uses less digits than its factorization.

1625081655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108338785.

The product of its (nonzero) digits is 72000, while the sum is 39.

The square root of 1625081655 is about 40312.3015343952. The cubic root of 1625081655 is about 1175.6870356571.

The spelling of 1625081655 in words is "one billion, six hundred twenty-five million, eighty-one thousand, six hundred fifty-five".