68400262642 has 8 divisors (see below), whose sum is σ = 102837347676. Its totient is φ = 34121146752.

The previous prime is 68400262631. The next prime is 68400262703. The reversal of 68400262642 is 24626200486.

It can be written as a sum of positive squares in 2 ways, for example, as 56510322961 + 11889939681 = 237719^2 + 109041^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 68400262595 and 68400262604.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39491203 + ... + 39492934.

Almost surely, 2^68400262642 is an apocalyptic number.

68400262642 is a deficient number, since it is larger than the sum of its proper divisors (34437085034).

68400262642 is a wasteful number, since it uses less digits than its factorization.

68400262642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78984572.

The product of its (nonzero) digits is 221184, while the sum is 40.

The spelling of 68400262642 in words is "sixty-eight billion, four hundred million, two hundred sixty-two thousand, six hundred forty-two".