208542371564 has 6 divisors (see below), whose sum is σ = 364949150244. Its totient is φ = 104271185780.

The previous prime is 208542371561. The next prime is 208542371579. The reversal of 208542371564 is 465173245802.

It is not an unprimeable number, because it can be changed into a prime (208542371561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26067796442 + ... + 26067796449.

It is an arithmetic number, because the mean of its divisors is an integer number (60824858374).

Almost surely, 2^208542371564 is an apocalyptic number.

It is an amenable number.

208542371564 is a deficient number, since it is larger than the sum of its proper divisors (156406778680).

208542371564 is a wasteful number, since it uses less digits than its factorization.

208542371564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52135592895 (or 52135592893 counting only the distinct ones).

The product of its (nonzero) digits is 1612800, while the sum is 47.

The spelling of 208542371564 in words is "two hundred eight billion, five hundred forty-two million, three hundred seventy-one thousand, five hundred sixty-four".