1139898555 has 32 divisors (see below), whose sum is σ = 2028448320. Its totient is φ = 607357440.

The previous prime is 1139898541. The next prime is 1139898583. The reversal of 1139898555 is 5558989311.

It is a happy number.

1139898555 is a `hidden beast` number, since 1 + 1 + 3 + 9 + 89 + 8 + 555 = 666.

It is not a de Polignac number, because 1139898555 - 2⁹ = 1139898043 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 160275 + ... + 167235.

It is an arithmetic number, because the mean of its divisors is an integer number (63389010).

Almost surely, 2^1139898555 is an apocalyptic number.

1139898555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1139898555 is a deficient number, since it is larger than the sum of its proper divisors (888549765).

1139898555 is a wasteful number, since it uses less digits than its factorization.

1139898555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8188 (or 8182 counting only the distinct ones).

The product of its digits is 1944000, while the sum is 54.

The square root of 1139898555 is about 33762.3837280486. The cubic root of 1139898555 is about 1044.6129393818.

The spelling of 1139898555 in words is "one billion, one hundred thirty-nine million, eight hundred ninety-eight thousand, five hundred fifty-five".