1055565532278 has 80 divisors (see below), whose sum is σ = 2504677801824. Its totient is φ = 331118565120.

The previous prime is 1055565532277. The next prime is 1055565532303. The reversal of 1055565532278 is 8722355655501.

1055565532278 is a `hidden beast` number, since 1 + 0 + 5 + 5 + 565 + 5 + 3 + 2 + 2 + 78 = 666.

It is a super-2 number, since 2×1055565532278² (a number of 25 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1055565532277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 30819423 + ... + 30853653.

Almost surely, 2^{1055565532278} is an apocalyptic number.

1055565532278 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1055565532278 is an abundant number, since it is smaller than the sum of its proper divisors (1449112269546).

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

1055565532278 is a wasteful number, since it uses less digits than its factorization.

1055565532278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45459 (or 45450 counting only the distinct ones).

The product of its (nonzero) digits is 12600000, while the sum is 54.

The spelling of 1055565532278 in words is "one trillion, fifty-five billion, five hundred sixty-five million, five hundred thirty-two thousand, two hundred seventy-eight".