68591154456 has 160 divisors (see below), whose sum is σ = 210975367680. Its totient is φ = 20647224000.

The previous prime is 68591154449. The next prime is 68591154487. The reversal of 68591154456 is 65445119586.

It is a happy number.

68591154456 is a `hidden beast` number, since 6 + 8 + 5 + 91 + 1 + 544 + 5 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1044465 + ... + 1108191.

It is an arithmetic number, because the mean of its divisors is an integer number (1318596048).

Almost surely, 2^68591154456 is an apocalyptic number.

68591154456 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68591154456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105487683840).

68591154456 is an abundant number, since it is smaller than the sum of its proper divisors (142384213224).

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

68591154456 is a wasteful number, since it uses less digits than its factorization.

68591154456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63907 (or 63894 counting only the distinct ones).

The product of its digits is 5184000, while the sum is 54.

The spelling of 68591154456 in words is "sixty-eight billion, five hundred ninety-one million, one hundred fifty-four thousand, four hundred fifty-six".