1655580081 has 8 divisors (see below), whose sum is σ = 2207822400. Its totient is φ = 1103528912.

The previous prime is 1655580053. The next prime is 1655580097. The reversal of 1655580081 is 1800855561.

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 1655580081 - 2⁵ = 1655580049 is a prime.

It is a super-2 number, since 2×1655580081² = 5481890809207933122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1653580081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26181 + ... + 63218.

It is an arithmetic number, because the mean of its divisors is an integer number (275977800).

Almost surely, 2^1655580081 is an apocalyptic number.

It is an amenable number.

1655580081 is a deficient number, since it is larger than the sum of its proper divisors (552242319).

1655580081 is an equidigital number, since it uses as much as digits as its factorization.

1655580081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95575.

The product of its (nonzero) digits is 48000, while the sum is 39.

The square root of 1655580081 is about 40688.8200984005. The cubic root of 1655580081 is about 1182.9963305540.

The spelling of 1655580081 in words is "one billion, six hundred fifty-five million, five hundred eighty thousand, eighty-one".