7871361336842 has 4 divisors (see below), whose sum is σ = 11807042005266. Its totient is φ = 3935680668420.

The previous prime is 7871361336841. The next prime is 7871361336847. The reversal of 7871361336842 is 2486331631787.

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., 3936021891481 + 3935339445361 = 1983941^2 + 1983769^2 .

It is not an unprimeable number, because it can be changed into a prime (7871361336841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1967840334209 + ... + 1967840334212.

Almost surely, 2^{7871361336842} is an apocalyptic number.

7871361336842 is a deficient number, since it is larger than the sum of its proper divisors (3935680668424).

7871361336842 is a wasteful number, since it uses less digits than its factorization.

7871361336842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3935680668423.

The product of its digits is 24385536, while the sum is 59.

The spelling of 7871361336842 in words is "seven trillion, eight hundred seventy-one billion, three hundred sixty-one million, three hundred thirty-six thousand, eight hundred forty-two".