145005457644 has 72 divisors (see below), whose sum is σ = 370516124160. Its totient is φ = 47813724000.

The previous prime is 145005457613. The next prime is 145005457669. The reversal of 145005457644 is 446754500541.

145005457644 is a `hidden beast` number, since 1 + 4 + 500 + 54 + 57 + 6 + 44 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 145005457644.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1243399 + ... + 1355009.

It is an arithmetic number, because the mean of its divisors is an integer number (5146057280).

Almost surely, 2^145005457644 is an apocalyptic number.

It is an amenable number.

145005457644 is an abundant number, since it is smaller than the sum of its proper divisors (225510666516).

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

145005457644 is a wasteful number, since it uses less digits than its factorization.

145005457644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112011 (or 112006 counting only the distinct ones).

The product of its (nonzero) digits is 1344000, while the sum is 45.

The spelling of 145005457644 in words is "one hundred forty-five billion, five million, four hundred fifty-seven thousand, six hundred forty-four".