208548678508 has 48 divisors (see below), whose sum is σ = 387471095424. Its totient is φ = 97876131840.

The previous prime is 208548678467. The next prime is 208548678521. The reversal of 208548678508 is 805876845802.

It is a super-2 number, since 2×208548678508² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50727373 + ... + 50731483.

It is an arithmetic number, because the mean of its divisors is an integer number (8072314488).

Almost surely, 2^208548678508 is an apocalyptic number.

It is an amenable number.

208548678508 is a deficient number, since it is larger than the sum of its proper divisors (178922416916).

208548678508 is a wasteful number, since it uses less digits than its factorization.

208548678508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5962 (or 5960 counting only the distinct ones).

The product of its (nonzero) digits is 34406400, while the sum is 61.

The spelling of 208548678508 in words is "two hundred eight billion, five hundred forty-eight million, six hundred seventy-eight thousand, five hundred eight".