27551920073 has 2 divisors, whose sum is σ = 27551920074. Its totient is φ = 27551920072.

The previous prime is 27551920069. The next prime is 27551920129. The reversal of 27551920073 is 37002915572.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25221251344 + 2330668729 = 158812^2 + 48277^2 .

It is a cyclic number.

It is not a de Polignac number, because 27551920073 - 2² = 27551920069 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 27551920073.

It is not a weakly prime, because it can be changed into another prime (27551920063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13775960036 + 13775960037.

It is an arithmetic number, because the mean of its divisors is an integer number (13775960037).

Almost surely, 2^27551920073 is an apocalyptic number.

It is an amenable number.

27551920073 is a deficient number, since it is larger than the sum of its proper divisors (1).

27551920073 is an equidigital number, since it uses as much as digits as its factorization.

27551920073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 132300, while the sum is 41.

It can be divided in two parts, 275519 and 20073, that added together give a palindrome (295592).

The spelling of 27551920073 in words is "twenty-seven billion, five hundred fifty-one million, nine hundred twenty thousand, seventy-three".