67139961088 has 72 divisors (see below), whose sum is σ = 139041567000. Its totient is φ = 32318275584.

The previous prime is 67139961079. The next prime is 67139961101. The reversal of 67139961088 is 88016993176.

It can be written as a sum of positive squares in 4 ways, for example, as 20400980224 + 46738980864 = 142832^2 + 216192^2 .

It is a Harshad number since it is a multiple of its sum of digits (58).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2578020 + ... + 2603932.

It is an arithmetic number, because the mean of its divisors is an integer number (1931132875).

Almost surely, 2^67139961088 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 67139961088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69520783500).

67139961088 is an abundant number, since it is smaller than the sum of its proper divisors (71901605912).

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

67139961088 is a wasteful number, since it uses less digits than its factorization.

67139961088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26307 (or 26293 counting only the distinct ones).

The product of its (nonzero) digits is 3919104, while the sum is 58.

The spelling of 67139961088 in words is "sixty-seven billion, one hundred thirty-nine million, nine hundred sixty-one thousand, eighty-eight".