55240640999 has 2 divisors, whose sum is σ = 55240641000. Its totient is φ = 55240640998.

The previous prime is 55240640933. The next prime is 55240641047. The reversal of 55240640999 is 99904604255.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55240640999 - 2¹² = 55240636903 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55240640999.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55240640699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27620320499 + 27620320500.

It is an arithmetic number, because the mean of its divisors is an integer number (27620320500).

Almost surely, 2^55240640999 is an apocalyptic number.

55240640999 is a deficient number, since it is larger than the sum of its proper divisors (1).

55240640999 is an equidigital number, since it uses as much as digits as its factorization.

55240640999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3499200, while the sum is 53.

The spelling of 55240640999 in words is "fifty-five billion, two hundred forty million, six hundred forty thousand, nine hundred ninety-nine".