68104921539 has 8 divisors (see below), whose sum is σ = 91127434432. Its totient is φ = 45242844840.

The previous prime is 68104921523. The next prime is 68104921657. The reversal of 68104921539 is 93512940186.

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

It is not a de Polignac number, because 68104921539 - 2⁴ = 68104921523 is a prime.

It is a super-2 number, since 2×68104921539² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68104921519) 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, 40108057 + ... + 40109754.

It is an arithmetic number, because the mean of its divisors is an integer number (11390929304).

Almost surely, 2^68104921539 is an apocalyptic number.

68104921539 is a deficient number, since it is larger than the sum of its proper divisors (23022512893).

68104921539 is a wasteful number, since it uses less digits than its factorization.

68104921539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80218097.

The product of its (nonzero) digits is 466560, while the sum is 48.

The spelling of 68104921539 in words is "sixty-eight billion, one hundred four million, nine hundred twenty-one thousand, five hundred thirty-nine".