145656771 has 16 divisors (see below), whose sum is σ = 209707680. Its totient is φ = 89395200.

The previous prime is 145656767. The next prime is 145656779. The reversal of 145656771 is 177656541.

145656771 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 145656771 - 2² = 145656767 is a prime.

It is not an unprimeable number, because it can be changed into a prime (145656779) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10371 + ... + 19971.

It is an arithmetic number, because the mean of its divisors is an integer number (13106730).

Almost surely, 2^145656771 is an apocalyptic number.

145656771 is a deficient number, since it is larger than the sum of its proper divisors (64050909).

145656771 is a wasteful number, since it uses less digits than its factorization.

145656771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10006.

The product of its digits is 176400, while the sum is 42.

The square root of 145656771 is about 12068.8346993403. The cubic root of 145656771 is about 526.1507890301.

The spelling of 145656771 in words is "one hundred forty-five million, six hundred fifty-six thousand, seven hundred seventy-one".