1868686245 has 24 divisors (see below), whose sum is σ = 3240061656. Its totient is φ = 996323328.

The previous prime is 1868686229. The next prime is 1868686283. The reversal of 1868686245 is 5426868681.

1868686245 is a `hidden beast` number, since 1 + 8 + 6 + 8 + 6 + 8 + 624 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 49322529 + 1819363716 = 7023^2 + 42654^2 .

It is not a de Polignac number, because 1868686245 - 2⁴ = 1868686229 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1868686191 and 1868686200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 281889 + ... + 288441.

It is an arithmetic number, because the mean of its divisors is an integer number (135002569).

Almost surely, 2^1868686245 is an apocalyptic number.

1868686245 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1868686245 is a deficient number, since it is larger than the sum of its proper divisors (1371375411).

1868686245 is a wasteful number, since it uses less digits than its factorization.

1868686245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12901 (or 12898 counting only the distinct ones).

The product of its digits is 4423680, while the sum is 54.

The square root of 1868686245 is about 43228.3037488172. The cubic root of 1868686245 is about 1231.7203865655.

The spelling of 1868686245 in words is "one billion, eight hundred sixty-eight million, six hundred eighty-six thousand, two hundred forty-five".