1678862145 has 32 divisors (see below), whose sum is σ = 2716179840. Its totient is φ = 885427200.

The previous prime is 1678862123. The next prime is 1678862167. The reversal of 1678862145 is 5412688761.

It is an interprime number because it is at equal distance from previous prime (1678862123) and next prime (1678862167).

It is not a de Polignac number, because 1678862145 - 2⁸ = 1678861889 is a prime.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 1678862094 and 1678862103.

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, 1596870 + ... + 1597920.

It is an arithmetic number, because the mean of its divisors is an integer number (84880620).

Almost surely, 2^1678862145 is an apocalyptic number.

1678862145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1678862145 is a deficient number, since it is larger than the sum of its proper divisors (1037317695).

1678862145 is a wasteful number, since it uses less digits than its factorization.

1678862145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2145.

The product of its digits is 645120, while the sum is 48.

The square root of 1678862145 is about 40973.9203030415. The cubic root of 1678862145 is about 1188.5159441713.

The spelling of 1678862145 in words is "one billion, six hundred seventy-eight million, eight hundred sixty-two thousand, one hundred forty-five".