207139109436 has 360 divisors, whose sum is σ = 657675849600. Its totient is φ = 56617989120.

The previous prime is 207139109423. The next prime is 207139109461. The reversal of 207139109436 is 634901931702.

207139109436 is a `hidden beast` number, since 207 + 1 + 3 + 9 + 1 + 0 + 9 + 436 = 666.

It is a super-2 number, since 2×207139109436² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 207139109391 and 207139109400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 43799520 + ... + 43804248.

It is an arithmetic number, because the mean of its divisors is an integer number (1826877360).

Almost surely, 2^207139109436 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 207139109436, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (328837924800).

207139109436 is an abundant number, since it is smaller than the sum of its proper divisors (450536740164).

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

207139109436 is a wasteful number, since it uses less digits than its factorization.

207139109436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4879 (or 4861 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 45.

The spelling of 207139109436 in words is "two hundred seven billion, one hundred thirty-nine million, one hundred nine thousand, four hundred thirty-six".