1544406606121 has 4 divisors (see below), whose sum is σ = 1547989916544. Its totient is φ = 1540823295700.

The previous prime is 1544406606103. The next prime is 1544406606131. The reversal of 1544406606121 is 1216066044451.

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 1544406606121 - 2¹⁹ = 1544406081833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1544406606131) 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, 1791654565 + ... + 1791655426.

It is an arithmetic number, because the mean of its divisors is an integer number (386997479136).

Almost surely, 2^{1544406606121} is an apocalyptic number.

It is an amenable number.

1544406606121 is a deficient number, since it is larger than the sum of its proper divisors (3583310423).

1544406606121 is an equidigital number, since it uses as much as digits as its factorization.

1544406606121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3583310422.

The product of its (nonzero) digits is 138240, while the sum is 40.

The spelling of 1544406606121 in words is "one trillion, five hundred forty-four billion, four hundred six million, six hundred six thousand, one hundred twenty-one".