55845887987 has 2 divisors, whose sum is σ = 55845887988. Its totient is φ = 55845887986.

The previous prime is 55845887969. The next prime is 55845888019. The reversal of 55845887987 is 78978854855.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55845887987 - 2¹⁴ = 55845871603 is a prime.

It is not a weakly prime, because it can be changed into another prime (55845887387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27922943993 + 27922943994.

It is an arithmetic number, because the mean of its divisors is an integer number (27922943994).

Almost surely, 2^55845887987 is an apocalyptic number.

55845887987 is a deficient number, since it is larger than the sum of its proper divisors (1).

55845887987 is an equidigital number, since it uses as much as digits as its factorization.

55845887987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 903168000, while the sum is 74.

The spelling of 55845887987 in words is "fifty-five billion, eight hundred forty-five million, eight hundred eighty-seven thousand, nine hundred eighty-seven".