145205521444 has 24 divisors (see below), whose sum is σ = 260336609568. Its totient is φ = 70824029760.

The previous prime is 145205521399. The next prime is 145205521451. The reversal of 145205521444 is 444125502541.

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, 1582759 + ... + 1671985.

It is an arithmetic number, because the mean of its divisors is an integer number (10847358732).

Almost surely, 2^145205521444 is an apocalyptic number.

It is an amenable number.

145205521444 is a deficient number, since it is larger than the sum of its proper divisors (115131088124).

145205521444 is a wasteful number, since it uses less digits than its factorization.

145205521444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99195 (or 99193 counting only the distinct ones).

The product of its (nonzero) digits is 128000, while the sum is 37.

The spelling of 145205521444 in words is "one hundred forty-five billion, two hundred five million, five hundred twenty-one thousand, four hundred forty-four".