1234455555678 has 32 divisors (see below), whose sum is σ = 2492471930400. Its totient is φ = 407571763200.

The previous prime is 1234455555677. The next prime is 1234455555721. The reversal of 1234455555678 is 8765555544321.

It is a happy number.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1234455555677) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1303273 + ... + 2041428.

It is an arithmetic number, because the mean of its divisors is an integer number (77889747825).

Almost surely, 2^{1234455555678} is an apocalyptic number.

1234455555678 is an abundant number, since it is smaller than the sum of its proper divisors (1258016374722).

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

1234455555678 is a wasteful number, since it uses less digits than its factorization.

1234455555678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3345292.

The product of its digits is 100800000, while the sum is 60.

The spelling of 1234455555678 in words is "one trillion, two hundred thirty-four billion, four hundred fifty-five million, five hundred fifty-five thousand, six hundred seventy-eight".