145541251554321 has 8 divisors (see below), whose sum is σ = 221777145225664. Its totient is φ = 83166429459600.

The previous prime is 145541251554317. The next prime is 145541251554331. The reversal of 145541251554321 is 123455152145541.

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

It is not a de Polignac number, because 145541251554321 - 2² = 145541251554317 is a prime.

It is not an unprimeable number, because it can be changed into a prime (145541251554331) 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, 3465267894130 + ... + 3465267894171.

It is an arithmetic number, because the mean of its divisors is an integer number (27722143153208).

Almost surely, 2^{145541251554321} is an apocalyptic number.

It is an amenable number.

145541251554321 is a deficient number, since it is larger than the sum of its proper divisors (76235893671343).

145541251554321 is an equidigital number, since it uses as much as digits as its factorization.

145541251554321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6930535788311.

The product of its digits is 2400000, while the sum is 48.

The spelling of 145541251554321 in words is "one hundred forty-five trillion, five hundred forty-one billion, two hundred fifty-one million, five hundred fifty-four thousand, three hundred twenty-one".