145703312649 has 20 divisors (see below), whose sum is σ = 230458836564. Its totient is φ = 91421685504.

The previous prime is 145703312647. The next prime is 145703312659. The reversal of 145703312649 is 946213307541.

145703312649 is a `hidden beast` number, since 1 + 4 + 57 + 0 + 331 + 264 + 9 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 75093537024 + 70609775625 = 274032^2 + 265725^2 .

It is not a de Polignac number, because 145703312649 - 2¹ = 145703312647 is a prime.

It is not an unprimeable number, because it can be changed into a prime (145703312647) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 52904692 + ... + 52907445.

Almost surely, 2^145703312649 is an apocalyptic number.

It is an amenable number.

145703312649 is a deficient number, since it is larger than the sum of its proper divisors (84755523915).

145703312649 is a wasteful number, since it uses less digits than its factorization.

145703312649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105812166 (or 105812157 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 45.

The spelling of 145703312649 in words is "one hundred forty-five billion, seven hundred three million, three hundred twelve thousand, six hundred forty-nine".