27561505153 has 96 divisors (see below), whose sum is σ = 39093062400. Its totient is φ = 19145871360.

The previous prime is 27561505109. The next prime is 27561505157. The reversal of 27561505153 is 35150516572.

It is not a de Polignac number, because 27561505153 - 2¹³ = 27561496961 is a prime.

It is not an unprimeable number, because it can be changed into a prime (27561505157) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 10210398 + ... + 10213096.

It is an arithmetic number, because the mean of its divisors is an integer number (407219400).

Almost surely, 2^27561505153 is an apocalyptic number.

27561505153 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

27561505153 is a deficient number, since it is larger than the sum of its proper divisors (11531557247).

27561505153 is a wasteful number, since it uses less digits than its factorization.

27561505153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2807 (or 2800 counting only the distinct ones).

The product of its (nonzero) digits is 157500, while the sum is 40.

The spelling of 27561505153 in words is "twenty-seven billion, five hundred sixty-one million, five hundred five thousand, one hundred fifty-three".