68521480739040 has 192 divisors, whose sum is σ = 246722733250560. Its totient is φ = 15659170037760.

The previous prime is 68521480739027. The next prime is 68521480739123. The reversal of 68521480739040 is 4093708412586.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16407721 + ... + 20155799.

It is an arithmetic number, because the mean of its divisors is an integer number (1285014235680).

It is a 1-persistent number, because it is pandigital, but 2⋅68521480739040 = 137042961478080 is not.

Almost surely, 2^{68521480739040} is an apocalyptic number.

68521480739040 is a gapful number since it is divisible by the number (60) 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 68521480739040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (123361366625280).

68521480739040 is an abundant number, since it is smaller than the sum of its proper divisors (178201252511520).

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

68521480739040 is a wasteful number, since it uses less digits than its factorization.

68521480739040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3753545 (or 3753537 counting only the distinct ones).

The product of its (nonzero) digits is 11612160, while the sum is 57.

The spelling of 68521480739040 in words is "sixty-eight trillion, five hundred twenty-one billion, four hundred eighty million, seven hundred thirty-nine thousand, forty".