68400071237 has 8 divisors (see below), whose sum is σ = 68796721440. Its totient is φ = 68003582800.

The previous prime is 68400071203. The next prime is 68400071279. The reversal of 68400071237 is 73217000486.

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

It is a cyclic number.

It is not a de Polignac number, because 68400071237 - 2²⁰ = 68399022661 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 68400071237.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68400001237) 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, 866303 + ... + 941955.

It is an arithmetic number, because the mean of its divisors is an integer number (8599590180).

Almost surely, 2^68400071237 is an apocalyptic number.

It is an amenable number.

68400071237 is a deficient number, since it is larger than the sum of its proper divisors (396650203).

68400071237 is a wasteful number, since it uses less digits than its factorization.

68400071237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80883.

The product of its (nonzero) digits is 56448, while the sum is 38.

The spelling of 68400071237 in words is "sixty-eight billion, four hundred million, seventy-one thousand, two hundred thirty-seven".