68949802258 has 4 divisors (see below), whose sum is σ = 103424703390. Its totient is φ = 34474901128.

The previous prime is 68949802249. The next prime is 68949802279. The reversal of 68949802258 is 85220894986.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 85220894986 = 2 ⋅42610447493.

It can be written as a sum of positive squares in only one way, i.e., 41256515689 + 27693286569 = 203117^2 + 166413^2 .

It is a super-4 number, since 4×68949802258⁴ (a number of 44 digits) contains 4444 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 68949802196 and 68949802205.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17237450563 + ... + 17237450566.

Almost surely, 2^68949802258 is an apocalyptic number.

68949802258 is a deficient number, since it is larger than the sum of its proper divisors (34474901132).

68949802258 is a wasteful number, since it uses less digits than its factorization.

68949802258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34474901131.

The product of its (nonzero) digits is 19906560, while the sum is 61.

The spelling of 68949802258 in words is "sixty-eight billion, nine hundred forty-nine million, eight hundred two thousand, two hundred fifty-eight".