1055665056 has 96 divisors (see below), whose sum is σ = 2856712320. Its totient is φ = 341093376.

The previous prime is 1055665043. The next prime is 1055665069. The reversal of 1055665056 is 6505665501.

It is an interprime number because it is at equal distance from previous prime (1055665043) and next prime (1055665069).

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×1055665056² = 2228857420918966272, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1558990 + ... + 1559666.

It is an arithmetic number, because the mean of its divisors is an integer number (29757420).

Almost surely, 2^1055665056 is an apocalyptic number.

1055665056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1055665056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1428356160).

1055665056 is an abundant number, since it is smaller than the sum of its proper divisors (1801047264).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1055665056 is a wasteful number, since it uses less digits than its factorization.

1055665056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1166 (or 1158 counting only the distinct ones).

The product of its (nonzero) digits is 135000, while the sum is 39.

The square root of 1055665056 is about 32490.9996152781. Note that the first 3 decimals coincide. The cubic root of 1055665056 is about 1018.2209974333.

The spelling of 1055665056 in words is "one billion, fifty-five million, six hundred sixty-five thousand, fifty-six".