28166250732155 has 4 divisors (see below), whose sum is σ = 33799500878592. Its totient is φ = 22533000585720.

The previous prime is 28166250732143. The next prime is 28166250732167. The reversal of 28166250732155 is 55123705266182.

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

It is an interprime number because it is at equal distance from previous prime (28166250732143) and next prime (28166250732167).

It is not a de Polignac number, because 28166250732155 - 2³⁴ = 28149070862971 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28166250732097 and 28166250732106.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2816625073211 + ... + 2816625073220.

It is an arithmetic number, because the mean of its divisors is an integer number (8449875219648).

Almost surely, 2^{28166250732155} is an apocalyptic number.

28166250732155 is a deficient number, since it is larger than the sum of its proper divisors (5633250146437).

28166250732155 is an equidigital number, since it uses as much as digits as its factorization.

28166250732155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5633250146436.

The product of its (nonzero) digits is 6048000, while the sum is 53.

The spelling of 28166250732155 in words is "twenty-eight trillion, one hundred sixty-six billion, two hundred fifty million, seven hundred thirty-two thousand, one hundred fifty-five".