1642675845 has 8 divisors (see below), whose sum is σ = 2628281376. Its totient is φ = 876093776.

The previous prime is 1642675843. The next prime is 1642675907. The reversal of 1642675845 is 5485762461.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1642675845 - 2¹ = 1642675843 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1642675794 and 1642675803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1642675843) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54755847 + ... + 54755876.

It is an arithmetic number, because the mean of its divisors is an integer number (328535172).

Almost surely, 2^1642675845 is an apocalyptic number.

1642675845 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1642675845 is a deficient number, since it is larger than the sum of its proper divisors (985605531).

1642675845 is a wasteful number, since it uses less digits than its factorization.

1642675845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109511731.

The product of its digits is 1612800, while the sum is 48.

The square root of 1642675845 is about 40529.9376387381. The cubic root of 1642675845 is about 1179.9147321801.

The spelling of 1642675845 in words is "one billion, six hundred forty-two million, six hundred seventy-five thousand, eight hundred forty-five".