208195643950 has 24 divisors (see below), whose sum is σ = 442564455312. Its totient is φ = 71381363520.

The previous prime is 208195643939. The next prime is 208195643993. The reversal of 208195643950 is 59346591802.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 297421999 + ... + 297422698.

It is an arithmetic number, because the mean of its divisors is an integer number (18440185638).

Almost surely, 2^208195643950 is an apocalyptic number.

208195643950 is an abundant number, since it is smaller than the sum of its proper divisors (234368811362).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

208195643950 is a wasteful number, since it uses less digits than its factorization.

208195643950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 594844716 (or 594844711 counting only the distinct ones).

The product of its (nonzero) digits is 2332800, while the sum is 52.

The spelling of 208195643950 in words is "two hundred eight billion, one hundred ninety-five million, six hundred forty-three thousand, nine hundred fifty".