27542436403640 has 64 divisors (see below), whose sum is σ = 63970412636160. Its totient is φ = 10661441132160.

The previous prime is 27542436403633. The next prime is 27542436403697. The reversal of 27542436403640 is 4630463424572.

It is a happy number.

It is a congruent 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, 145534757 + ... + 145723883.

It is an arithmetic number, because the mean of its divisors is an integer number (999537697440).

Almost surely, 2^{27542436403640} is an apocalyptic number.

27542436403640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27542436403640 is an abundant number, since it is smaller than the sum of its proper divisors (36427976232520).

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

27542436403640 is a wasteful number, since it uses less digits than its factorization.

27542436403640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306612 (or 306608 counting only the distinct ones).

The product of its (nonzero) digits is 11612160, while the sum is 50.

The spelling of 27542436403640 in words is "twenty-seven trillion, five hundred forty-two billion, four hundred thirty-six million, four hundred three thousand, six hundred forty".