655386779007541 has 12 divisors (see below), whose sum is σ = 782993802170028. Its totient is φ = 546577390985472.

The previous prime is 655386779007517. The next prime is 655386779007547. The reversal of 655386779007541 is 145700977683556.

It can be written as a sum of positive squares in 2 ways, for example, as 636903443406916 + 18483335600625 = 25236946^2 + 4299225^2 .

It is not a de Polignac number, because 655386779007541 - 2⁵ = 655386779007509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655386779007547) 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 in 11 ways as a sum of consecutive naturals, for example, 180746489916 + ... + 180746493541.

It is an arithmetic number, because the mean of its divisors is an integer number (65249483514169).

Almost surely, 2^{655386779007541} is an apocalyptic number.

It is an amenable number.

655386779007541 is a deficient number, since it is larger than the sum of its proper divisors (127607023162487).

655386779007541 is a wasteful number, since it uses less digits than its factorization.

655386779007541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361492983508 (or 361492983501 counting only the distinct ones).

The product of its (nonzero) digits is 1333584000, while the sum is 73.

The spelling of 655386779007541 in words is "six hundred fifty-five trillion, three hundred eighty-six billion, seven hundred seventy-nine million, seven thousand, five hundred forty-one".