67981131054 has 96 divisors (see below), whose sum is σ = 164268000000. Its totient is φ = 20192239872.

The previous prime is 67981131019. The next prime is 67981131077. The reversal of 67981131054 is 45013118976.

It is a super-2 number, since 2×67981131054² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 13596447 + ... + 13601445.

It is an arithmetic number, because the mean of its divisors is an integer number (1711125000).

Almost surely, 2^67981131054 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 67981131054, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82134000000).

67981131054 is an abundant number, since it is smaller than the sum of its proper divisors (96286868946).

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

67981131054 is a wasteful number, since it uses less digits than its factorization.

67981131054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7382 (or 7379 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 45.

The spelling of 67981131054 in words is "sixty-seven billion, nine hundred eighty-one million, one hundred thirty-one thousand, fifty-four".