1056105505551 has 8 divisors (see below), whose sum is σ = 1408155899904. Its totient is φ = 704062724120.

The previous prime is 1056105505541. The next prime is 1056105505597. The reversal of 1056105505551 is 1555055016501.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1056105505551 - 2⁵ = 1056105505519 is a prime.

It is a super-2 number, since 2×1056105505551² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1056105505531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1571265 + ... + 2140346.

It is an arithmetic number, because the mean of its divisors is an integer number (176019487488).

Almost surely, 2^{1056105505551} is an apocalyptic number.

1056105505551 is a deficient number, since it is larger than the sum of its proper divisors (352050394353).

1056105505551 is an equidigital number, since it uses as much as digits as its factorization.

1056105505551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3806461.

The product of its (nonzero) digits is 93750, while the sum is 39.

The spelling of 1056105505551 in words is "one trillion, fifty-six billion, one hundred five million, five hundred five thousand, five hundred fifty-one".