68739855893787 has 8 divisors (see below), whose sum is σ = 98703382821904. Its totient is φ = 42301449780768.

The previous prime is 68739855893773. The next prime is 68739855893789. The reversal of 68739855893787 is 78739855893786.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 68739855893787 - 2²² = 68739851699483 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 68739855893787.

It is not an unprimeable number, because it can be changed into a prime (68739855893789) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 881280203728 + ... + 881280203805.

It is an arithmetic number, because the mean of its divisors is an integer number (12337922852738).

Almost surely, 2^{68739855893787} is an apocalyptic number.

68739855893787 is a deficient number, since it is larger than the sum of its proper divisors (29963526928117).

68739855893787 is a wasteful number, since it uses less digits than its factorization.

68739855893787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1762560407549.

The product of its digits is 153628876800, while the sum is 93.

Subtracting 68739855893787 from its reverse (78739855893786), we obtain a palindrome (9999999999999).

The spelling of 68739855893787 in words is "sixty-eight trillion, seven hundred thirty-nine billion, eight hundred fifty-five million, eight hundred ninety-three thousand, seven hundred eighty-seven".