145278240785 has 8 divisors (see below), whose sum is σ = 174341072616. Its totient is φ = 116217803520.

The previous prime is 145278240769. The next prime is 145278240853. The reversal of 145278240785 is 587042872541.

It can be written as a sum of positive squares in 4 ways, for example, as 28590413569 + 116687827216 = 169087^2 + 341596^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 145278240785 - 2⁴ = 145278240769 is a prime.

It is a super-2 number, since 2×145278240785² (a number of 23 digits) contains 22 as substring.

It is a Duffinian 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, 462344 + ... + 710153.

It is an arithmetic number, because the mean of its divisors is an integer number (21792634077).

Almost surely, 2^145278240785 is an apocalyptic number.

It is an amenable number.

145278240785 is a deficient number, since it is larger than the sum of its proper divisors (29062831831).

145278240785 is a wasteful number, since it uses less digits than its factorization.

145278240785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1197283.

The product of its (nonzero) digits is 5017600, while the sum is 53.

The spelling of 145278240785 in words is "one hundred forty-five billion, two hundred seventy-eight million, two hundred forty thousand, seven hundred eighty-five".