1056281247638 has 16 divisors (see below), whose sum is σ = 1594410352080. Its totient is φ = 524815653600.

The previous prime is 1056281247631. The next prime is 1056281247649. The reversal of 1056281247638 is 8367421826501.

It is a super-2 number, since 2×1056281247638² (a number of 25 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 1056281247638.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1056281247631) 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, 662753 + ... + 1597436.

It is an arithmetic number, because the mean of its divisors is an integer number (99650647005).

Almost surely, 2^{1056281247638} is an apocalyptic number.

1056281247638 is a deficient number, since it is larger than the sum of its proper divisors (538129104442).

1056281247638 is a wasteful number, since it uses less digits than its factorization.

1056281247638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2261663.

The product of its (nonzero) digits is 3870720, while the sum is 53.

The spelling of 1056281247638 in words is "one trillion, fifty-six billion, two hundred eighty-one million, two hundred forty-seven thousand, six hundred thirty-eight".