145231512643 has 4 divisors (see below), whose sum is σ = 165978871600. Its totient is φ = 124484153688.

The previous prime is 145231512617. The next prime is 145231512653. The reversal of 145231512643 is 346215132541.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 145231512643 - 2⁵ = 145231512611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145231512653) 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, 10373679468 + ... + 10373679481.

It is an arithmetic number, because the mean of its divisors is an integer number (41494717900).

Almost surely, 2^145231512643 is an apocalyptic number.

145231512643 is a deficient number, since it is larger than the sum of its proper divisors (20747358957).

145231512643 is an equidigital number, since it uses as much as digits as its factorization.

145231512643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20747358956.

The product of its digits is 86400, while the sum is 37.

The spelling of 145231512643 in words is "one hundred forty-five billion, two hundred thirty-one million, five hundred twelve thousand, six hundred forty-three".