27122235640 has 16 divisors (see below), whose sum is σ = 61025030280. Its totient is φ = 10848894240.

The previous prime is 27122235607. The next prime is 27122235641. The reversal of 27122235640 is 4653222172.

It is a super-2 number, since 2×27122235640² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 27122235596 and 27122235605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27122235641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 339027906 + ... + 339027985.

Almost surely, 2^27122235640 is an apocalyptic number.

27122235640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27122235640 is an abundant number, since it is smaller than the sum of its proper divisors (33902794640).

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

27122235640 is a wasteful number, since it uses less digits than its factorization.

27122235640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 678055902 (or 678055898 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 34.

The spelling of 27122235640 in words is "twenty-seven billion, one hundred twenty-two million, two hundred thirty-five thousand, six hundred forty".