1406116526509 has 4 divisors (see below), whose sum is σ = 1406274118816. Its totient is φ = 1405958934204.

The previous prime is 1406116526459. The next prime is 1406116526587. The reversal of 1406116526509 is 9056256116041.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1406116526509 - 2⁹ = 1406116525997 is a prime.

It is a super-2 number, since 2×1406116526509² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1406113526509) 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, 78782769 + ... + 78800614.

It is an arithmetic number, because the mean of its divisors is an integer number (351568529704).

Almost surely, 2^{1406116526509} is an apocalyptic number.

It is an amenable number.

1406116526509 is a deficient number, since it is larger than the sum of its proper divisors (157592307).

1406116526509 is an equidigital number, since it uses as much as digits as its factorization.

1406116526509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157592306.

The product of its (nonzero) digits is 388800, while the sum is 46.

The spelling of 1406116526509 in words is "one trillion, four hundred six billion, one hundred sixteen million, five hundred twenty-six thousand, five hundred nine".