55400442029 has 2 divisors, whose sum is σ = 55400442030. Its totient is φ = 55400442028.

The previous prime is 55400441981. The next prime is 55400442043. The reversal of 55400442029 is 92024400455.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41974585129 + 13425856900 = 204877^2 + 115870^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55400442029 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55400442029.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55400448029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27700221014 + 27700221015.

It is an arithmetic number, because the mean of its divisors is an integer number (27700221015).

Almost surely, 2^55400442029 is an apocalyptic number.

It is an amenable number.

55400442029 is a deficient number, since it is larger than the sum of its proper divisors (1).

55400442029 is an equidigital number, since it uses as much as digits as its factorization.

55400442029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 57600, while the sum is 35.

The spelling of 55400442029 in words is "fifty-five billion, four hundred million, four hundred forty-two thousand, twenty-nine".