139409841643 has 4 divisors (see below), whose sum is σ = 139431398560. Its totient is φ = 139388284728.

The previous prime is 139409841611. The next prime is 139409841661. The reversal of 139409841643 is 346148904931.

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 139409841643 - 2⁵ = 139409841611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139409811643) 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, 10768755 + ... + 10781692.

It is an arithmetic number, because the mean of its divisors is an integer number (34857849640).

Almost surely, 2^139409841643 is an apocalyptic number.

139409841643 is a deficient number, since it is larger than the sum of its proper divisors (21556917).

139409841643 is an equidigital number, since it uses as much as digits as its factorization.

139409841643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21556916.

The product of its (nonzero) digits is 2239488, while the sum is 52.

The spelling of 139409841643 in words is "one hundred thirty-nine billion, four hundred nine million, eight hundred forty-one thousand, six hundred forty-three".