1405518112861 has 8 divisors (see below), whose sum is σ = 1497317965920. Its totient is φ = 1315500781392.

The previous prime is 1405518112849. The next prime is 1405518112909. The reversal of 1405518112861 is 1682118155041.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1405518112861 - 2⁵ = 1405518112829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1405518112811) 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, 445628770 + ... + 445631923.

It is an arithmetic number, because the mean of its divisors is an integer number (187164745740).

Almost surely, 2^{1405518112861} is an apocalyptic number.

It is an amenable number.

1405518112861 is a deficient number, since it is larger than the sum of its proper divisors (91799853059).

1405518112861 is an equidigital number, since it uses as much as digits as its factorization.

1405518112861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 891260795.

The product of its (nonzero) digits is 76800, while the sum is 43.

The spelling of 1405518112861 in words is "one trillion, four hundred five billion, five hundred eighteen million, one hundred twelve thousand, eight hundred sixty-one".