1406782756081 has 4 divisors (see below), whose sum is σ = 1406878672500. Its totient is φ = 1406686839664.

The previous prime is 1406782756063. The next prime is 1406782756109. The reversal of 1406782756081 is 1806572876041.

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

It can be written as a sum of positive squares in 2 ways, for example, as 830132365456 + 576650390625 = 911116^2 + 759375^2 .

It is a cyclic number.

It is not a de Polignac number, because 1406782756081 - 2¹¹ = 1406782754033 is a prime.

It is a super-2 number, since 2×1406782756081² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1406782756381) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47936206 + ... + 47965543.

It is an arithmetic number, because the mean of its divisors is an integer number (351719668125).

Almost surely, 2^{1406782756081} is an apocalyptic number.

It is an amenable number.

1406782756081 is a deficient number, since it is larger than the sum of its proper divisors (95916419).

1406782756081 is an equidigital number, since it uses as much as digits as its factorization.

1406782756081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95916418.

The product of its (nonzero) digits is 4515840, while the sum is 55.

The spelling of 1406782756081 in words is "one trillion, four hundred six billion, seven hundred eighty-two million, seven hundred fifty-six thousand, eighty-one".