139966623648 has 336 divisors, whose sum is σ = 432919287360. Its totient is φ = 44440399872.

The previous prime is 139966623571. The next prime is 139966623689. The reversal of 139966623648 is 846326669931.

It is a happy number.

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 189399663 + ... + 189400401.

It is an arithmetic number, because the mean of its divisors is an integer number (1288450260).

Almost surely, 2^139966623648 is an apocalyptic number.

139966623648 is a gapful number since it is divisible by the number (18) 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 139966623648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (216459643680).

139966623648 is an abundant number, since it is smaller than the sum of its proper divisors (292952663712).

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

139966623648 is an equidigital number, since it uses as much as digits as its factorization.

139966623648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1143 (or 1120 counting only the distinct ones).

The product of its digits is 60466176, while the sum is 63.

The spelling of 139966623648 in words is "one hundred thirty-nine billion, nine hundred sixty-six million, six hundred twenty-three thousand, six hundred forty-eight".