145145472784 has 20 divisors (see below), whose sum is σ = 302851611916. Its totient is φ = 66990218112.

The previous prime is 145145472757. The next prime is 145145472799. The reversal of 145145472784 is 487274541541.

It can be written as a sum of positive squares in 2 ways, for example, as 55756432384 + 89389040400 = 236128^2 + 298980^2 .

It is a Harshad number since it is a multiple of its sum of digits (52).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 348907179 + ... + 348907594.

Almost surely, 2^145145472784 is an apocalyptic number.

It is an amenable number.

145145472784 is an abundant number, since it is smaller than the sum of its proper divisors (157706139132).

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

145145472784 is a wasteful number, since it uses less digits than its factorization.

145145472784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 697814794 (or 697814788 counting only the distinct ones).

The product of its digits is 5017600, while the sum is 52.

The spelling of 145145472784 in words is "one hundred forty-five billion, one hundred forty-five million, four hundred seventy-two thousand, seven hundred eighty-four".