1055880861 has 12 divisors (see below), whose sum is σ = 1637692992. Its totient is φ = 603360408.

The previous prime is 1055880851. The next prime is 1055880871. The reversal of 1055880861 is 1680885501.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1055880851) and next prime (1055880871).

It is not a de Polignac number, because 1055880861 - 2⁷ = 1055880733 is a prime.

It is a super-2 number, since 2×1055880861² = 2229768785252202642, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1055880811) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3591285 + ... + 3591578.

It is an arithmetic number, because the mean of its divisors is an integer number (136474416).

Almost surely, 2^1055880861 is an apocalyptic number.

It is an amenable number.

1055880861 is a deficient number, since it is larger than the sum of its proper divisors (581812131).

1055880861 is an equidigital number, since it uses as much as digits as its factorization.

1055880861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7182880 (or 7182873 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 42.

The square root of 1055880861 is about 32494.3204421942. The cubic root of 1055880861 is about 1018.2903761974.

It can be divided in two parts, 10558 and 80861, that added together give a palindrome (91419).

The spelling of 1055880861 in words is "one billion, fifty-five million, eight hundred eighty thousand, eight hundred sixty-one".