1081686615870 has 64 divisors (see below), whose sum is σ = 2967175411200. Its totient is φ = 247220692608.

The previous prime is 1081686615857. The next prime is 1081686615913. The reversal of 1081686615870 is 785166861801.

It is a self number, because there is not a number n which added to its sum of digits gives 1081686615870.

It is a congruent number.

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, 2202289 + ... + 2648291.

It is an arithmetic number, because the mean of its divisors is an integer number (46362115800).

Almost surely, 2^{1081686615870} is an apocalyptic number.

1081686615870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1081686615870 is an abundant number, since it is smaller than the sum of its proper divisors (1885488795330).

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

1081686615870 is a wasteful number, since it uses less digits than its factorization.

1081686615870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 457569.

The product of its (nonzero) digits is 3870720, while the sum is 57.

The spelling of 1081686615870 in words is "one trillion, eighty-one billion, six hundred eighty-six million, six hundred fifteen thousand, eight hundred seventy".