145664771 has 8 divisors (see below), whose sum is σ = 168030720. Its totient is φ = 123688008.

The previous prime is 145664747. The next prime is 145664801. The reversal of 145664771 is 177466541.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 145664771 - 2⁶ = 145664707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145664731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96491 + ... + 97988.

It is an arithmetic number, because the mean of its divisors is an integer number (21003840).

Almost surely, 2^145664771 is an apocalyptic number.

145664771 is a deficient number, since it is larger than the sum of its proper divisors (22365949).

145664771 is a wasteful number, since it uses less digits than its factorization.

145664771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194593.

The product of its digits is 141120, while the sum is 41.

The square root of 145664771 is about 12069.1661269534. The cubic root of 145664771 is about 526.1604215592.

The spelling of 145664771 in words is "one hundred forty-five million, six hundred sixty-four thousand, seven hundred seventy-one".