27513541640 has 64 divisors (see below), whose sum is σ = 66686805360. Its totient is φ = 10155893760.

The previous prime is 27513541639. The next prime is 27513541667. The reversal of 27513541640 is 4614531572.

It can be written as a sum of positive squares in 8 ways, for example, as 7439752516 + 20073789124 = 86254^2 + 141682^2 .

It is a junction number, because it is equal to n+sod(n) for n = 27513541594 and 27513541603.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2697350 + ... + 2707530.

Almost surely, 2^27513541640 is an apocalyptic number.

27513541640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27513541640 is an abundant number, since it is smaller than the sum of its proper divisors (39173263720).

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

27513541640 is a wasteful number, since it uses less digits than its factorization.

27513541640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15402 (or 15398 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 38.

The spelling of 27513541640 in words is "twenty-seven billion, five hundred thirteen million, five hundred forty-one thousand, six hundred forty".