68406624048 has 90 divisors (see below), whose sum is σ = 205607010324. Its totient is φ = 19541125632.

The previous prime is 68406624047. The next prime is 68406624053. The reversal of 68406624048 is 84042660486.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a junction number, because it is equal to n+sod(n) for n = 68406623988 and 68406624006.

It is not an unprimeable number, because it can be changed into a prime (68406624047) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 12681640 + ... + 12687032.

Almost surely, 2^68406624048 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68406624048, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102803505162).

68406624048 is an abundant number, since it is smaller than the sum of its proper divisors (137200386276).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

68406624048 is an frugal number, since it uses more digits than its factorization.

68406624048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10811 (or 5405 counting only the distinct ones).

The product of its (nonzero) digits is 1769472, while the sum is 48.

Multiplying 68406624048 by its sum of digits (48), we get a square (3283517954304 = 1812048²).

68406624048 divided by its sum of digits (48) gives a square (1425138001 = 37751²).

The spelling of 68406624048 in words is "sixty-eight billion, four hundred six million, six hundred twenty-four thousand, forty-eight".