1056305481987 has 16 divisors (see below), whose sum is σ = 1625235622400. Its totient is φ = 597742906752.

The previous prime is 1056305481953. The next prime is 1056305481991. The reversal of 1056305481987 is 7891845036501.

1056305481987 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1056305481987 - 2⁸ = 1056305481731 is a prime.

It is a super-2 number, since 2×1056305481987² (a number of 25 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1056305441987) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 244173862 + ... + 244178187.

It is an arithmetic number, because the mean of its divisors is an integer number (101577226400).

Almost surely, 2^{1056305481987} is an apocalyptic number.

1056305481987 is a deficient number, since it is larger than the sum of its proper divisors (568930140413).

1056305481987 is a wasteful number, since it uses less digits than its factorization.

1056305481987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 488352162.

The product of its (nonzero) digits is 7257600, while the sum is 57.

The spelling of 1056305481987 in words is "one trillion, fifty-six billion, three hundred five million, four hundred eighty-one thousand, nine hundred eighty-seven".