55779777797754 has 16 divisors (see below), whose sum is σ = 111559631949792. Its totient is φ = 18593246540208.

The previous prime is 55779777797753. The next prime is 55779777797831. The reversal of 55779777797754 is 45779777797755.

It is a super-2 number, since 2×55779777797754² (a number of 28 digits) contains 22 as substring.

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

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11594457 + ... + 15684099.

It is an arithmetic number, because the mean of its divisors is an integer number (6972476996862).

Almost surely, 2^{55779777797754} is an apocalyptic number.

55779777797754 is an abundant number, since it is smaller than the sum of its proper divisors (55779854152038).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55779777797754 is a wasteful number, since it uses less digits than its factorization.

55779777797754 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6362861.

The product of its digits is 233474440500, while the sum is 93.

Subtracting from 55779777797754 its reverse (45779777797755), we obtain a palindrome (9999999999999).

The spelling of 55779777797754 in words is "fifty-five trillion, seven hundred seventy-nine billion, seven hundred seventy-seven million, seven hundred ninety-seven thousand, seven hundred fifty-four".