27155984240 has 240 divisors, whose sum is σ = 82293063264. Its totient is φ = 8234956800.

The previous prime is 27155984189. The next prime is 27155984243. The reversal of 27155984240 is 4248955172.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27155984243) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1586930 + ... + 1603950.

Almost surely, 2^27155984240 is an apocalyptic number.

27155984240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27155984240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41146531632).

27155984240 is an abundant number, since it is smaller than the sum of its proper divisors (55137079024).

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

27155984240 is a wasteful number, since it uses less digits than its factorization.

27155984240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17096 (or 17083 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 47.

The spelling of 27155984240 in words is "twenty-seven billion, one hundred fifty-five million, nine hundred eighty-four thousand, two hundred forty".