13555778890 has 16 divisors (see below), whose sum is σ = 25187512320. Its totient is φ = 5247398160.

The previous prime is 13555778857. The next prime is 13555778891. The reversal of 13555778890 is 9887755531.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (13555778891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21863850 + ... + 21864469.

It is an arithmetic number, because the mean of its divisors is an integer number (1574219520).

Almost surely, 2^13555778890 is an apocalyptic number.

13555778890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13555778890 is a deficient number, since it is larger than the sum of its proper divisors (11631733430).

13555778890 is a wasteful number, since it uses less digits than its factorization.

13555778890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43728357.

The product of its (nonzero) digits is 10584000, while the sum is 58.

The spelling of 13555778890 in words is "thirteen billion, five hundred fifty-five million, seven hundred seventy-eight thousand, eight hundred ninety".