28129170268937 has 4 divisors (see below), whose sum is σ = 28139701597056. Its totient is φ = 28118638940820.

The previous prime is 28129170268933. The next prime is 28129170268949. The reversal of 28129170268937 is 73986207192182.

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 not a de Polignac number, because 28129170268937 - 2² = 28129170268933 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28129170268933) 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, 5265660053 + ... + 5265665394.

It is an arithmetic number, because the mean of its divisors is an integer number (7034925399264).

Almost surely, 2^{28129170268937} is an apocalyptic number.

It is an amenable number.

28129170268937 is a deficient number, since it is larger than the sum of its proper divisors (10531328119).

28129170268937 is a wasteful number, since it uses less digits than its factorization.

28129170268937 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10531328118.

The product of its (nonzero) digits is 36578304, while the sum is 65.

The spelling of 28129170268937 in words is "twenty-eight trillion, one hundred twenty-nine billion, one hundred seventy million, two hundred sixty-eight thousand, nine hundred thirty-seven".