1868536866870 has 24 divisors (see below), whose sum is σ = 4858195854096. Its totient is φ = 498276497808.

The previous prime is 1868536866841. The next prime is 1868536866877. The reversal of 1868536866870 is 786686358681.

1868536866870 is a `hidden beast` number, since 1 + 8 + 6 + 8 + 536 + 8 + 6 + 6 + 87 + 0 = 666.

It is a super-2 number, since 2×1868536866870² (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 (1868536866877) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10380760282 + ... + 10380760461.

It is an arithmetic number, because the mean of its divisors is an integer number (202424827254).

Almost surely, 2^{1868536866870} is an apocalyptic number.

1868536866870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1868536866870 is an abundant number, since it is smaller than the sum of its proper divisors (2989658987226).

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

1868536866870 is a wasteful number, since it uses less digits than its factorization.

1868536866870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20761520756 (or 20761520753 counting only the distinct ones).

The product of its (nonzero) digits is 557383680, while the sum is 72.

The spelling of 1868536866870 in words is "one trillion, eight hundred sixty-eight billion, five hundred thirty-six million, eight hundred sixty-six thousand, eight hundred seventy".