208261245629 has 4 divisors (see below), whose sum is σ = 219222363840. Its totient is φ = 197300127420.

The previous prime is 208261245611. The next prime is 208261245691. The reversal of 208261245629 is 926542162802.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 926542162802 = 2 ⋅463271081401.

It is a cyclic number.

It is not a de Polignac number, because 208261245629 - 2²⁴ = 208244468413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (208261245029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5480559077 + ... + 5480559114.

It is an arithmetic number, because the mean of its divisors is an integer number (54805590960).

Almost surely, 2^208261245629 is an apocalyptic number.

It is an amenable number.

208261245629 is a deficient number, since it is larger than the sum of its proper divisors (10961118211).

208261245629 is a wasteful number, since it uses less digits than its factorization.

208261245629 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10961118210.

The product of its (nonzero) digits is 829440, while the sum is 47.

The spelling of 208261245629 in words is "two hundred eight billion, two hundred sixty-one million, two hundred forty-five thousand, six hundred twenty-nine".