55284000781 has 2 divisors, whose sum is σ = 55284000782. Its totient is φ = 55284000780.

The previous prime is 55284000743. The next prime is 55284000797. The reversal of 55284000781 is 18700048255.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30411872100 + 24872128681 = 174390^2 + 157709^2 .

It is a cyclic number.

It is not a de Polignac number, because 55284000781 - 2²⁹ = 54747129869 is a prime.

It is a super-2 number, since 2×55284000781² (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 (55284000881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27642000390 + 27642000391.

It is an arithmetic number, because the mean of its divisors is an integer number (27642000391).

Almost surely, 2^55284000781 is an apocalyptic number.

It is an amenable number.

55284000781 is a deficient number, since it is larger than the sum of its proper divisors (1).

55284000781 is an equidigital number, since it uses as much as digits as its factorization.

55284000781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 89600, while the sum is 40.

The spelling of 55284000781 in words is "fifty-five billion, two hundred eighty-four million, seven hundred eighty-one", and thus it is an aban number.