1056372780181 has 2 divisors, whose sum is σ = 1056372780182. Its totient is φ = 1056372780180.

The previous prime is 1056372780167. The next prime is 1056372780233. The reversal of 1056372780181 is 1810872736501.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 771702513156 + 284670267025 = 878466^2 + 533545^2 .

It is an emirp because it is prime and its reverse (1810872736501) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1056372780181 - 2⁵ = 1056372780149 is a prime.

It is a super-2 number, since 2×1056372780181² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1056372780121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 528186390090 + 528186390091.

It is an arithmetic number, because the mean of its divisors is an integer number (528186390091).

Almost surely, 2^{1056372780181} is an apocalyptic number.

It is an amenable number.

1056372780181 is a deficient number, since it is larger than the sum of its proper divisors (1).

1056372780181 is an equidigital number, since it uses as much as digits as its factorization.

1056372780181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 564480, while the sum is 49.

The spelling of 1056372780181 in words is "one trillion, fifty-six billion, three hundred seventy-two million, seven hundred eighty thousand, one hundred eighty-one".