27543497640 has 64 divisors (see below), whose sum is σ = 82976313600. Its totient is φ = 7314193152.

The previous prime is 27543497633. The next prime is 27543497669. The reversal of 27543497640 is 4679434572.

It is a happy number.

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, 451507 + ... + 508866.

It is an arithmetic number, because the mean of its divisors is an integer number (1296504900).

Almost surely, 2^27543497640 is an apocalyptic number.

27543497640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27543497640 is an abundant number, since it is smaller than the sum of its proper divisors (55432815960).

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

27543497640 is a wasteful number, since it uses less digits than its factorization.

27543497640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 960626 (or 960622 counting only the distinct ones).

The product of its (nonzero) digits is 5080320, while the sum is 51.

The spelling of 27543497640 in words is "twenty-seven billion, five hundred forty-three million, four hundred ninety-seven thousand, six hundred forty".