208660860442 has 4 divisors (see below), whose sum is σ = 312991290666. Its totient is φ = 104330430220.

The previous prime is 208660860433. The next prime is 208660860461. The reversal of 208660860442 is 244068066802.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 208656190521 + 4669921 = 456789^2 + 2161^2 .

It is a junction number, because it is equal to n+sod(n) for n = 208660860392 and 208660860401.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52165215109 + ... + 52165215112.

Almost surely, 2^208660860442 is an apocalyptic number.

208660860442 is a deficient number, since it is larger than the sum of its proper divisors (104330430224).

208660860442 is a wasteful number, since it uses less digits than its factorization.

208660860442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104330430223.

The product of its (nonzero) digits is 884736, while the sum is 46.

The spelling of 208660860442 in words is "two hundred eight billion, six hundred sixty million, eight hundred sixty thousand, four hundred forty-two".