1098139313887 has 16 divisors (see below), whose sum is σ = 1369333308672. Its totient is φ = 855552625920.

The previous prime is 1098139313849. The next prime is 1098139313963. The reversal of 1098139313887 is 7883139318901.

It is a cyclic number.

It is not a de Polignac number, because 1098139313887 - 2³⁹ = 548383499999 is a prime.

It is a super-2 number, since 2×1098139313887² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1098139313287) 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, 695793 + ... + 1637194.

It is an arithmetic number, because the mean of its divisors is an integer number (85583331792).

Almost surely, 2^{1098139313887} is an apocalyptic number.

1098139313887 is a deficient number, since it is larger than the sum of its proper divisors (271193994785).

1098139313887 is a wasteful number, since it uses less digits than its factorization.

1098139313887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2339118.

The product of its (nonzero) digits is 7838208, while the sum is 61.

The spelling of 1098139313887 in words is "one trillion, ninety-eight billion, one hundred thirty-nine million, three hundred thirteen thousand, eight hundred eighty-seven".