27131632520 has 16 divisors (see below), whose sum is σ = 61046173260. Its totient is φ = 10852652992.

The previous prime is 27131632441. The next prime is 27131632523. The reversal of 27131632520 is 2523613172.

It can be written as a sum of positive squares in 2 ways, for example, as 25498341124 + 1633291396 = 159682^2 + 40414^2 .

It is a super-2 number, since 2×27131632520² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (27131632523) 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, 339145367 + ... + 339145446.

Almost surely, 2^27131632520 is an apocalyptic number.

27131632520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27131632520 is an abundant number, since it is smaller than the sum of its proper divisors (33914540740).

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

27131632520 is a wasteful number, since it uses less digits than its factorization.

27131632520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 678290824 (or 678290820 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 32.

The spelling of 27131632520 in words is "twenty-seven billion, one hundred thirty-one million, six hundred thirty-two thousand, five hundred twenty".