145736649 has 6 divisors (see below), whose sum is σ = 210508506. Its totient is φ = 97157760.

The previous prime is 145736639. The next prime is 145736651. The reversal of 145736649 is 946637541.

145736649 is a `hidden beast` number, since 14 + 573 + 6 + 64 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 90383049 + 55353600 = 9507^2 + 7440^2 .

It is not a de Polignac number, because 145736649 - 2¹⁵ = 145703881 is a prime.

It is not an unprimeable number, because it can be changed into a prime (145736639) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8096472 + ... + 8096489.

It is an arithmetic number, because the mean of its divisors is an integer number (35084751).

Almost surely, 2^145736649 is an apocalyptic number.

It is an amenable number.

145736649 is a deficient number, since it is larger than the sum of its proper divisors (64771857).

145736649 is a wasteful number, since it uses less digits than its factorization.

145736649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16192967 (or 16192964 counting only the distinct ones).

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

The square root of 145736649 is about 12072.1435130635. The cubic root of 145736649 is about 526.2469516094.

The spelling of 145736649 in words is "one hundred forty-five million, seven hundred thirty-six thousand, six hundred forty-nine".