68398487040 has 160 divisors (see below), whose sum is σ = 235481865696. Its totient is φ = 16836526080.

The previous prime is 68398487033. The next prime is 68398487041. The reversal of 68398487040 is 4078489386.

68398487040 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (160).

It is a super-2 number, since 2×68398487040² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68398487041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 242701 + ... + 442380.

Almost surely, 2^68398487040 is an apocalyptic number.

68398487040 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

68398487040 is an abundant number, since it is smaller than the sum of its proper divisors (167083378656).

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

68398487040 is a wasteful number, since it uses less digits than its factorization.

68398487040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 685120 (or 685104 counting only the distinct ones).

The product of its (nonzero) digits is 9289728, while the sum is 57.

The spelling of 68398487040 in words is "sixty-eight billion, three hundred ninety-eight million, four hundred eighty-seven thousand, forty".