103671556643 has 4 divisors (see below), whose sum is σ = 104417395320. Its totient is φ = 102925717968.

The previous prime is 103671556633. The next prime is 103671556649. The reversal of 103671556643 is 346655176301.

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

It is a cyclic number.

It is not a de Polignac number, because 103671556643 - 2⁶ = 103671556579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (103671556649) 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, 372919130 + ... + 372919407.

It is an arithmetic number, because the mean of its divisors is an integer number (26104348830).

Almost surely, 2^103671556643 is an apocalyptic number.

103671556643 is a deficient number, since it is larger than the sum of its proper divisors (745838677).

103671556643 is an equidigital number, since it uses as much as digits as its factorization.

103671556643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 745838676.

The product of its (nonzero) digits is 1360800, while the sum is 47.

The spelling of 103671556643 in words is "one hundred three billion, six hundred seventy-one million, five hundred fifty-six thousand, six hundred forty-three".