145454561121 has 4 divisors (see below), whose sum is σ = 193939414832. Its totient is φ = 96969707412.

The previous prime is 145454561117. The next prime is 145454561129. The reversal of 145454561121 is 121165454541.

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, and also an emirpimes, since its reverse is a distinct semiprime: 121165454541 = 3 ⋅40388484847.

It is not a de Polignac number, because 145454561121 - 2² = 145454561117 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 145454561121.

It is not an unprimeable number, because it can be changed into a prime (145454561129) 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, 24242426851 + ... + 24242426856.

It is an arithmetic number, because the mean of its divisors is an integer number (48484853708).

Almost surely, 2^145454561121 is an apocalyptic number.

It is an amenable number.

145454561121 is a deficient number, since it is larger than the sum of its proper divisors (48484853711).

145454561121 is an equidigital number, since it uses as much as digits as its factorization.

145454561121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48484853710.

The product of its digits is 96000, while the sum is 39.

The spelling of 145454561121 in words is "one hundred forty-five billion, four hundred fifty-four million, five hundred sixty-one thousand, one hundred twenty-one".