27155520000 has 800 divisors, whose sum is σ = 115050672000. Its totient is φ = 6193152000.

The previous prime is 27155519977. The next prime is 27155520013. The reversal of 27155520000 is 2555172.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (800).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 60479776 + ... + 60480224.

It is an arithmetic number, because the mean of its divisors is an integer number (143813340).

Almost surely, 2^27155520000 is an apocalyptic number.

27155520000 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 27155520000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57525336000).

27155520000 is an abundant number, since it is smaller than the sum of its proper divisors (87895152000).

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

27155520000 is an frugal number, since it uses more digits than its factorization.

27155520000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 503 (or 466 counting only the distinct ones).

The product of its (nonzero) digits is 3500, while the sum is 27.

It can be divided in two parts, 27 and 155520000, that multiplied together give a square (4199040000 = 64800²).

The spelling of 27155520000 in words is "twenty-seven billion, one hundred fifty-five million, five hundred twenty thousand".