145639216229 has 4 divisors (see below), whose sum is σ = 156842232876. Its totient is φ = 134436199584.

The previous prime is 145639216213. The next prime is 145639216237. The reversal of 145639216229 is 922612936541.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11104312129 + 134534904100 = 105377^2 + 366790^2 .

It is a cyclic number.

It is not a de Polignac number, because 145639216229 - 2⁴ = 145639216213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145639216249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5601508304 + ... + 5601508329.

It is an arithmetic number, because the mean of its divisors is an integer number (39210558219).

Almost surely, 2^145639216229 is an apocalyptic number.

It is an amenable number.

145639216229 is a deficient number, since it is larger than the sum of its proper divisors (11203016647).

145639216229 is a wasteful number, since it uses less digits than its factorization.

145639216229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11203016646.

The product of its digits is 1399680, while the sum is 50.

The spelling of 145639216229 in words is "one hundred forty-five billion, six hundred thirty-nine million, two hundred sixteen thousand, two hundred twenty-nine".