1056557053439 has 4 divisors (see below), whose sum is σ = 1102494316656. Its totient is φ = 1010619790224.

The previous prime is 1056557053427. The next prime is 1056557053499. The reversal of 1056557053439 is 9343507556501.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1056557053439 - 2⁴ = 1056557053423 is a prime.

It is a super-2 number, since 2×1056557053439² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1056557053499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22968631574 + ... + 22968631619.

It is an arithmetic number, because the mean of its divisors is an integer number (275623579164).

Almost surely, 2^{1056557053439} is an apocalyptic number.

1056557053439 is a deficient number, since it is larger than the sum of its proper divisors (45937263217).

1056557053439 is an equidigital number, since it uses as much as digits as its factorization.

1056557053439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45937263216.

The product of its (nonzero) digits is 8505000, while the sum is 53.

The spelling of 1056557053439 in words is "one trillion, fifty-six billion, five hundred fifty-seven million, fifty-three thousand, four hundred thirty-nine".