145577671321 has 4 divisors (see below), whose sum is σ = 145612082944. Its totient is φ = 145543259700.

The previous prime is 145577671297. The next prime is 145577671339. The reversal of 145577671321 is 123176775541.

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 145577671321 - 2⁵ = 145577671289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145577671391) 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, 17199465 + ... + 17207926.

It is an arithmetic number, because the mean of its divisors is an integer number (36403020736).

Almost surely, 2^145577671321 is an apocalyptic number.

It is an amenable number.

145577671321 is a deficient number, since it is larger than the sum of its proper divisors (34411623).

145577671321 is an equidigital number, since it uses as much as digits as its factorization.

145577671321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34411622.

The product of its digits is 1234800, while the sum is 49.

The spelling of 145577671321 in words is "one hundred forty-five billion, five hundred seventy-seven million, six hundred seventy-one thousand, three hundred twenty-one".