109139642680 has 192 divisors, whose sum is σ = 264194848800. Its totient is φ = 40564592640.

The previous prime is 109139642617. The next prime is 109139642687. The reversal of 109139642680 is 86246931901.

It is a happy number.

It is a super-2 number, since 2×109139642680² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109139642687) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 209480820 + ... + 209481340.

Almost surely, 2^109139642680 is an apocalyptic number.

109139642680 is a gapful number since it is divisible by the number (10) 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 109139642680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (132097424400).

109139642680 is an abundant number, since it is smaller than the sum of its proper divisors (155055206120).

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

109139642680 is a wasteful number, since it uses less digits than its factorization.

109139642680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 822 (or 799 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 49.

The spelling of 109139642680 in words is "one hundred nine billion, one hundred thirty-nine million, six hundred forty-two thousand, six hundred eighty".