208138814570 has 32 divisors (see below), whose sum is σ = 378457926912. Its totient is φ = 82410020352.

The previous prime is 208138814567. The next prime is 208138814593. The reversal of 208138814570 is 75418831802.

It is a super-2 number, since 2×208138814570² (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, 2296739 + ... + 2385641.

It is an arithmetic number, because the mean of its divisors is an integer number (11826810216).

Almost surely, 2^208138814570 is an apocalyptic number.

208138814570 is a deficient number, since it is larger than the sum of its proper divisors (170319112342).

208138814570 is a wasteful number, since it uses less digits than its factorization.

208138814570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91286.

The product of its (nonzero) digits is 430080, while the sum is 47.

The spelling of 208138814570 in words is "two hundred eight billion, one hundred thirty-eight million, eight hundred fourteen thousand, five hundred seventy".