27750430136 has 128 divisors (see below), whose sum is σ = 63375480000. Its totient is φ = 11217346560.

The previous prime is 27750430109. The next prime is 27750430139. The reversal of 27750430136 is 63103405772.

It is a self number, because there is not a number n which added to its sum of digits gives 27750430136.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27750430139) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27502400 + ... + 27503408.

Almost surely, 2^27750430136 is an apocalyptic number.

27750430136 is a gapful number since it is divisible by the number (26) 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 27750430136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31687740000).

27750430136 is an abundant number, since it is smaller than the sum of its proper divisors (35625049864).

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

27750430136 is a wasteful number, since it uses less digits than its factorization.

27750430136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1897 (or 1893 counting only the distinct ones).

The product of its (nonzero) digits is 105840, while the sum is 38.

The spelling of 27750430136 in words is "twenty-seven billion, seven hundred fifty million, four hundred thirty thousand, one hundred thirty-six".