55787606387 has 2 divisors, whose sum is σ = 55787606388. Its totient is φ = 55787606386.

The previous prime is 55787606359. The next prime is 55787606449. The reversal of 55787606387 is 78360678755.

It is an a-pointer prime, because the next prime (55787606449) can be obtained adding 55787606387 to its sum of digits (62).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55787606387 - 2⁸ = 55787606131 is a prime.

It is a super-2 number, since 2×55787606387² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (55787603387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27893803193 + 27893803194.

It is an arithmetic number, because the mean of its divisors is an integer number (27893803194).

Almost surely, 2^55787606387 is an apocalyptic number.

55787606387 is a deficient number, since it is larger than the sum of its proper divisors (1).

55787606387 is an equidigital number, since it uses as much as digits as its factorization.

55787606387 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 59270400, while the sum is 62.

The spelling of 55787606387 in words is "fifty-five billion, seven hundred eighty-seven million, six hundred six thousand, three hundred eighty-seven".