1081555671 has 8 divisors (see below), whose sum is σ = 1648084864. Its totient is φ = 618031800.

The previous prime is 1081555633. The next prime is 1081555729. The reversal of 1081555671 is 1765551801.

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

It is not a de Polignac number, because 1081555671 - 2¹³ = 1081547479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1081555171) by changing a digit.

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, 25751305 + ... + 25751346.

It is an arithmetic number, because the mean of its divisors is an integer number (206010608).

Almost surely, 2^1081555671 is an apocalyptic number.

1081555671 is a deficient number, since it is larger than the sum of its proper divisors (566529193).

1081555671 is an equidigital number, since it uses as much as digits as its factorization.

1081555671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51502661.

The product of its (nonzero) digits is 42000, while the sum is 39.

The square root of 1081555671 is about 32887.0137136226. The cubic root of 1081555671 is about 1026.4779538854.

The spelling of 1081555671 in words is "one billion, eighty-one million, five hundred fifty-five thousand, six hundred seventy-one".