1081857877856 has 48 divisors (see below), whose sum is σ = 2518117489440. Its totient is φ = 447665326080.

The previous prime is 1081857877813. The next prime is 1081857877879. The reversal of 1081857877856 is 6587787581801.

It is a self number, because there is not a number n which added to its sum of digits gives 1081857877856.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83264585 + ... + 83277576.

It is an arithmetic number, because the mean of its divisors is an integer number (52460781030).

Almost surely, 2^{1081857877856} is an apocalyptic number.

1081857877856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1081857877856 is an abundant number, since it is smaller than the sum of its proper divisors (1436259611584).

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

1081857877856 is a wasteful number, since it uses less digits than its factorization.

1081857877856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166542207 (or 166542199 counting only the distinct ones).

The product of its (nonzero) digits is 210739200, while the sum is 71.

The spelling of 1081857877856 in words is "one trillion, eighty-one billion, eight hundred fifty-seven million, eight hundred seventy-seven thousand, eight hundred fifty-six".