55143405787 has 2 divisors, whose sum is σ = 55143405788. Its totient is φ = 55143405786.

The previous prime is 55143405761. The next prime is 55143405839. The reversal of 55143405787 is 78750434155.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55143405787 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55143405787.

It is not a weakly prime, because it can be changed into another prime (55143405727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27571702893 + 27571702894.

It is an arithmetic number, because the mean of its divisors is an integer number (27571702894).

Almost surely, 2^55143405787 is an apocalyptic number.

55143405787 is a deficient number, since it is larger than the sum of its proper divisors (1).

55143405787 is an equidigital number, since it uses as much as digits as its factorization.

55143405787 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2352000, while the sum is 49.

The spelling of 55143405787 in words is "fifty-five billion, one hundred forty-three million, four hundred five thousand, seven hundred eighty-seven".