145689556 has 6 divisors (see below), whose sum is σ = 254956730. Its totient is φ = 72844776.

The previous prime is 145689539. The next prime is 145689559. The reversal of 145689556 is 655986541.

145689556 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 132250000 + 13439556 = 11500^2 + 3666^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145689559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18211191 + ... + 18211198.

Almost surely, 2^145689556 is an apocalyptic number.

It is an amenable number.

145689556 is a deficient number, since it is larger than the sum of its proper divisors (109267174).

145689556 is a wasteful number, since it uses less digits than its factorization.

145689556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36422393 (or 36422391 counting only the distinct ones).

The product of its digits is 1296000, while the sum is 49.

The square root of 145689556 is about 12070.1928733554. The cubic root of 145689556 is about 526.1902620996.

The spelling of 145689556 in words is "one hundred forty-five million, six hundred eighty-nine thousand, five hundred fifty-six".