1055649871 has 4 divisors (see below), whose sum is σ = 1080199912. Its totient is φ = 1031099832.

The previous prime is 1055649863. The next prime is 1055649887. The reversal of 1055649871 is 1789465501.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1055649871 - 2³ = 1055649863 is a prime.

It is a super-2 number, since 2×1055649871² = 2228793300284633282, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1055649821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12274956 + ... + 12275041.

It is an arithmetic number, because the mean of its divisors is an integer number (270049978).

Almost surely, 2^1055649871 is an apocalyptic number.

1055649871 is a deficient number, since it is larger than the sum of its proper divisors (24550041).

1055649871 is an equidigital number, since it uses as much as digits as its factorization.

1055649871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24550040.

The product of its (nonzero) digits is 302400, while the sum is 46.

The square root of 1055649871 is about 32490.7659343389. The cubic root of 1055649871 is about 1018.2161152787.

The spelling of 1055649871 in words is "one billion, fifty-five million, six hundred forty-nine thousand, eight hundred seventy-one".