28161167623 has 8 divisors (see below), whose sum is σ = 29671614000. Its totient is φ = 26653549248.

The previous prime is 28161167609. The next prime is 28161167651. The reversal of 28161167623 is 32676116182.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28161167623 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28161167623.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28161167603) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 686536 + ... + 726397.

It is an arithmetic number, because the mean of its divisors is an integer number (3708951750).

Almost surely, 2^28161167623 is an apocalyptic number.

28161167623 is a deficient number, since it is larger than the sum of its proper divisors (1510446377).

28161167623 is a wasteful number, since it uses less digits than its factorization.

28161167623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1414001.

The product of its digits is 145152, while the sum is 43.

The spelling of 28161167623 in words is "twenty-eight billion, one hundred sixty-one million, one hundred sixty-seven thousand, six hundred twenty-three".