1056665217054 has 16 divisors (see below), whose sum is σ = 2113385199120. Its totient is φ = 352212611520.

The previous prime is 1056665217053. The next prime is 1056665217059. The reversal of 1056665217054 is 4507125666501.

It is a super-2 number, since 2×1056665217054² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1056665216994 and 1056665217012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1056665217053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2028889 + ... + 2495940.

It is an arithmetic number, because the mean of its divisors is an integer number (132086574945).

Almost surely, 2^{1056665217054} is an apocalyptic number.

1056665217054 is an abundant number, since it is smaller than the sum of its proper divisors (1056719982066).

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

1056665217054 is a wasteful number, since it uses less digits than its factorization.

1056665217054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4563755.

The product of its (nonzero) digits is 1512000, while the sum is 48.

The spelling of 1056665217054 in words is "one trillion, fifty-six billion, six hundred sixty-five million, two hundred seventeen thousand, fifty-four".