145231289440 has 48 divisors (see below), whose sum is σ = 343223712720. Its totient is φ = 58073080320.

The previous prime is 145231289431. The next prime is 145231289491. The reversal of 145231289440 is 44982132541.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 332710 + ... + 633370.

It is an arithmetic number, because the mean of its divisors is an integer number (7150494015).

Almost surely, 2^145231289440 is an apocalyptic number.

145231289440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145231289440 is an abundant number, since it is smaller than the sum of its proper divisors (197992423280).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

145231289440 is a wasteful number, since it uses less digits than its factorization.

145231289440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303695 (or 303687 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 43.

The spelling of 145231289440 in words is "one hundred forty-five billion, two hundred thirty-one million, two hundred eighty-nine thousand, four hundred forty".