55398697933 has 2 divisors, whose sum is σ = 55398697934. Its totient is φ = 55398697932.

The previous prime is 55398697877. The next prime is 55398697961. The reversal of 55398697933 is 33979689355.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54176286564 + 1222411369 = 232758^2 + 34963^2 .

It is a cyclic number.

It is not a de Polignac number, because 55398697933 - 2²¹ = 55396600781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55398697733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27699348966 + 27699348967.

It is an arithmetic number, because the mean of its divisors is an integer number (27699348967).

Almost surely, 2^55398697933 is an apocalyptic number.

It is an amenable number.

55398697933 is a deficient number, since it is larger than the sum of its proper divisors (1).

55398697933 is an equidigital number, since it uses as much as digits as its factorization.

55398697933 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 165337200, while the sum is 67.

The spelling of 55398697933 in words is "fifty-five billion, three hundred ninety-eight million, six hundred ninety-seven thousand, nine hundred thirty-three".