8777777555553 has 32 divisors (see below), whose sum is σ = 12656519568000. Its totient is φ = 5391348028416.

The previous prime is 8777777555441. The next prime is 8777777555567. The reversal of 8777777555553 is 3555557777778.

It is not a de Polignac number, because 8777777555553 - 2²⁰ = 8777776506977 is a prime.

It is a super-2 number, since 2×8777777555553² (a number of 27 digits) contains 22 as substring.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (8777777556553) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9050778 + ... + 9973571.

It is an arithmetic number, because the mean of its divisors is an integer number (395516236500).

Almost surely, 2^{8777777555553} is an apocalyptic number.

8777777555553 is a gapful number since it is divisible by the number (83) formed by its first and last digit.

It is an amenable number.

8777777555553 is a deficient number, since it is larger than the sum of its proper divisors (3878742012447).

8777777555553 is a wasteful number, since it uses less digits than its factorization.

8777777555553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19024561.

The product of its digits is 8823675000, while the sum is 78.

The spelling of 8777777555553 in words is "eight trillion, seven hundred seventy-seven billion, seven hundred seventy-seven million, five hundred fifty-five thousand, five hundred fifty-three".