27612135840 has 48 divisors (see below), whose sum is σ = 86978229408. Its totient is φ = 7363236096.

The previous prime is 27612135827. The next prime is 27612135847. The reversal of 27612135840 is 4853121672.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×27612135840² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (27612135847) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28762162 + ... + 28763121.

It is an arithmetic number, because the mean of its divisors is an integer number (1812046446).

Almost surely, 2^27612135840 is an apocalyptic number.

27612135840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27612135840 is an abundant number, since it is smaller than the sum of its proper divisors (59366093568).

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

27612135840 is a wasteful number, since it uses less digits than its factorization.

27612135840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57525301 (or 57525293 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 39.

The spelling of 27612135840 in words is "twenty-seven billion, six hundred twelve million, one hundred thirty-five thousand, eight hundred forty".