780000555055 has 16 divisors (see below), whose sum is σ = 948263437440. Its totient is φ = 615869816832.

The previous prime is 780000555049. The next prime is 780000555079. The reversal of 780000555055 is 550555000087.

It is a cyclic number.

It is not a de Polignac number, because 780000555055 - 2³¹ = 777853071407 is a prime.

It is a super-2 number, since 2×780000555055² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 780000554999 and 780000555017.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2644359 + ... + 2924488.

It is an arithmetic number, because the mean of its divisors is an integer number (59266464840).

Almost surely, 2^780000555055 is an apocalyptic number.

780000555055 is a deficient number, since it is larger than the sum of its proper divisors (168262882385).

780000555055 is a wasteful number, since it uses less digits than its factorization.

780000555055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5569218.

The product of its (nonzero) digits is 175000, while the sum is 40.

The spelling of 780000555055 in words is "seven hundred eighty billion, five hundred fifty-five thousand, fifty-five".