145144454145121 has 4 divisors (see below), whose sum is σ = 147188742231744. Its totient is φ = 143100166058500.

The previous prime is 145144454145107. The next prime is 145144454145193. The reversal of 145144454145121 is 121541454441541.

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 145144454145121 - 2⁷ = 145144454144993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145144454145421) 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, 1022144043205 + ... + 1022144043346.

It is an arithmetic number, because the mean of its divisors is an integer number (36797185557936).

Almost surely, 2^{145144454145121} is an apocalyptic number.

It is an amenable number.

145144454145121 is a deficient number, since it is larger than the sum of its proper divisors (2044288086623).

145144454145121 is an equidigital number, since it uses as much as digits as its factorization.

145144454145121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2044288086622.

The product of its digits is 1024000, while the sum is 46.

The spelling of 145144454145121 in words is "one hundred forty-five trillion, one hundred forty-four billion, four hundred fifty-four million, one hundred forty-five thousand, one hundred twenty-one".