645167100029 has 4 divisors (see below), whose sum is σ = 645578822784. Its totient is φ = 644755377276.

The previous prime is 645167099989. The next prime is 645167100091. The reversal of 645167100029 is 920001761546.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-645167100029 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 (645167130029) 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, 205859027 + ... + 205862160.

It is an arithmetic number, because the mean of its divisors is an integer number (161394705696).

Almost surely, 2^645167100029 is an apocalyptic number.

It is an amenable number.

645167100029 is a deficient number, since it is larger than the sum of its proper divisors (411722755).

645167100029 is a wasteful number, since it uses less digits than its factorization.

645167100029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411722754.

The product of its (nonzero) digits is 90720, while the sum is 41.

The spelling of 645167100029 in words is "six hundred forty-five billion, one hundred sixty-seven million, one hundred thousand, twenty-nine".