68861399040 has 936 divisors, whose sum is σ = 292666395840. Its totient is φ = 14629994496.

The previous prime is 68861399011. The next prime is 68861399077. The reversal of 68861399040 is 4099316886.

It is a super-2 number, since 2×68861399040² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1299271654 + ... + 1299271706.

Almost surely, 2^68861399040 is an apocalyptic number.

68861399040 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 68861399040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (146333197920).

68861399040 is an abundant number, since it is smaller than the sum of its proper divisors (223804996800).

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

68861399040 is a wasteful number, since it uses less digits than its factorization.

68861399040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167 (or 89 counting only the distinct ones).

The product of its (nonzero) digits is 2239488, while the sum is 54.

The spelling of 68861399040 in words is "sixty-eight billion, eight hundred sixty-one million, three hundred ninety-nine thousand, forty".