68436718402 has 8 divisors (see below), whose sum is σ = 110551622076. Its totient is φ = 31586177712.

The previous prime is 68436718397. The next prime is 68436718409. The reversal of 68436718402 is 20481763486.

It can be written as a sum of positive squares in 2 ways, for example, as 66388160281 + 2048558121 = 257659^2 + 45261^2 .

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

It is not an unprimeable number, because it can be changed into a prime (68436718409) 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, 1316090713 + ... + 1316090764.

Almost surely, 2^68436718402 is an apocalyptic number.

68436718402 is a deficient number, since it is larger than the sum of its proper divisors (42114903674).

68436718402 is a wasteful number, since it uses less digits than its factorization.

68436718402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2632181492.

The product of its (nonzero) digits is 1548288, while the sum is 49.

The spelling of 68436718402 in words is "sixty-eight billion, four hundred thirty-six million, seven hundred eighteen thousand, four hundred two".