55052779981 has 2 divisors, whose sum is σ = 55052779982. Its totient is φ = 55052779980.

The previous prime is 55052779973. The next prime is 55052779993. The reversal of 55052779981 is 18997725055.

It is a happy number.

55052779981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33587892900 + 21464887081 = 183270^2 + 146509^2 .

It is a cyclic number.

It is not a de Polignac number, because 55052779981 - 2³ = 55052779973 is a prime.

It is a super-2 number, since 2×55052779981² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55052773981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27526389990 + 27526389991.

It is an arithmetic number, because the mean of its divisors is an integer number (27526389991).

Almost surely, 2^55052779981 is an apocalyptic number.

It is an amenable number.

55052779981 is a deficient number, since it is larger than the sum of its proper divisors (1).

55052779981 is an equidigital number, since it uses as much as digits as its factorization.

55052779981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7938000, while the sum is 58.

The spelling of 55052779981 in words is "fifty-five billion, fifty-two million, seven hundred seventy-nine thousand, nine hundred eighty-one".