208886148145 has 4 divisors (see below), whose sum is σ = 250663377780. Its totient is φ = 167108918512.

The previous prime is 208886148139. The next prime is 208886148169. The reversal of 208886148145 is 541841688802.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 541841688802 = 2 ⋅270920844401.

It can be written as a sum of positive squares in 2 ways, for example, as 69734021184 + 139152126961 = 264072^2 + 373031^2 .

It is a cyclic number.

It is not a de Polignac number, because 208886148145 - 2¹¹ = 208886146097 is a prime.

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, 20888614810 + ... + 20888614819.

It is an arithmetic number, because the mean of its divisors is an integer number (62665844445).

Almost surely, 2^208886148145 is an apocalyptic number.

It is an amenable number.

208886148145 is a deficient number, since it is larger than the sum of its proper divisors (41777229635).

208886148145 is an equidigital number, since it uses as much as digits as its factorization.

208886148145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41777229634.

The product of its (nonzero) digits is 3932160, while the sum is 55.

The spelling of 208886148145 in words is "two hundred eight billion, eight hundred eighty-six million, one hundred forty-eight thousand, one hundred forty-five".