1400818142781 has 12 divisors (see below), whose sum is σ = 2093176535580. Its totient is φ = 901676045760.

The previous prime is 1400818142777. The next prime is 1400818142797. The reversal of 1400818142781 is 1872418180041.

1400818142781 is a `hidden beast` number, since 1 + 40 + 0 + 8 + 181 + 427 + 8 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 443436128100 + 957382014681 = 665910^2 + 978459^2 .

It is not a de Polignac number, because 1400818142781 - 2² = 1400818142777 is a prime.

It is a super-2 number, since 2×1400818142781² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1400818142761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2683559400 + ... + 2683559921.

It is an arithmetic number, because the mean of its divisors is an integer number (174431377965).

Almost surely, 2^{1400818142781} is an apocalyptic number.

It is an amenable number.

1400818142781 is a deficient number, since it is larger than the sum of its proper divisors (692358392799).

1400818142781 is a wasteful number, since it uses less digits than its factorization.

1400818142781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5367119356 (or 5367119353 counting only the distinct ones).

The product of its (nonzero) digits is 114688, while the sum is 45.

The spelling of 1400818142781 in words is "one trillion, four hundred billion, eight hundred eighteen million, one hundred forty-two thousand, seven hundred eighty-one".