55779777797755 has 48 divisors (see below), whose sum is σ = 73698871260672. Its totient is φ = 40498312219200.

The previous prime is 55779777797753. The next prime is 55779777797831.

55779777797755 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 55779777797755 - 2¹ = 55779777797753 is a prime.

It is a super-2 number, since 2×55779777797755² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55779777797753) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 861471292 + ... + 861536038.

It is an arithmetic number, because the mean of its divisors is an integer number (1535393151264).

Almost surely, 2^{55779777797755} is an apocalyptic number.

55779777797755 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

55779777797755 is a deficient number, since it is larger than the sum of its proper divisors (17919093462917).

55779777797755 is a wasteful number, since it uses less digits than its factorization.

55779777797755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67168 (or 67157 counting only the distinct ones).

The product of its digits is 291843050625, while the sum is 94.

The spelling of 55779777797755 in words is "fifty-five trillion, seven hundred seventy-nine billion, seven hundred seventy-seven million, seven hundred ninety-seven thousand, seven hundred fifty-five".