27216512440 has 64 divisors (see below), whose sum is σ = 69827002560. Its totient is φ = 9458042880.

The previous prime is 27216512417. The next prime is 27216512461. The reversal of 27216512440 is 4421561272.

It is a super-3 number, since 3×27216512440³ (a number of 32 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a junction number, because it is equal to n+sod(n) for n = 27216512396 and 27216512405.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1530556 + ... + 1548235.

It is an arithmetic number, because the mean of its divisors is an integer number (1091046915).

Almost surely, 2^27216512440 is an apocalyptic number.

27216512440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27216512440 is an abundant number, since it is smaller than the sum of its proper divisors (42610490120).

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

27216512440 is a wasteful number, since it uses less digits than its factorization.

27216512440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3078832 (or 3078828 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 34.

The spelling of 27216512440 in words is "twenty-seven billion, two hundred sixteen million, five hundred twelve thousand, four hundred forty".