145617549 has 32 divisors (see below), whose sum is σ = 243219456. Its totient is φ = 75285120.

The previous prime is 145617547. The next prime is 145617559. The reversal of 145617549 is 945716541.

It is not a de Polignac number, because 145617549 - 2¹ = 145617547 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 145617549.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145617541) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 51049 + ... + 53825.

It is an arithmetic number, because the mean of its divisors is an integer number (7600608).

Almost surely, 2^145617549 is an apocalyptic number.

It is an amenable number.

145617549 is a deficient number, since it is larger than the sum of its proper divisors (97601907).

145617549 is a wasteful number, since it uses less digits than its factorization.

145617549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3025.

The product of its digits is 151200, while the sum is 42.

The square root of 145617549 is about 12067.2096608951. The cubic root of 145617549 is about 526.1035580438.

The spelling of 145617549 in words is "one hundred forty-five million, six hundred seventeen thousand, five hundred forty-nine".