1958671642139 has 4 divisors (see below), whose sum is σ = 1958683476360. Its totient is φ = 1958659807920.

The previous prime is 1958671642117. The next prime is 1958671642177. The reversal of 1958671642139 is 9312461768591.

It is a happy number.

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 1958671642139 - 2¹² = 1958671638043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1958671642189) 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, 5665274 + ... + 6001055.

It is an arithmetic number, because the mean of its divisors is an integer number (489670869090).

Almost surely, 2^{1958671642139} is an apocalyptic number.

1958671642139 is a deficient number, since it is larger than the sum of its proper divisors (11834221).

1958671642139 is a wasteful number, since it uses less digits than its factorization.

1958671642139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11834220.

The product of its digits is 19595520, while the sum is 62.

The spelling of 1958671642139 in words is "one trillion, nine hundred fifty-eight billion, six hundred seventy-one million, six hundred forty-two thousand, one hundred thirty-nine".