1642702645 has 8 divisors (see below), whose sum is σ = 1971859104. Its totient is φ = 1313751504.

The previous prime is 1642702631. The next prime is 1642702657. The reversal of 1642702645 is 5462072461.

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 1642702645 - 2¹⁷ = 1642571573 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33139 + ... + 66208.

It is an arithmetic number, because the mean of its divisors is an integer number (246482388).

Almost surely, 2^1642702645 is an apocalyptic number.

It is an amenable number.

1642702645 is a deficient number, since it is larger than the sum of its proper divisors (329156459).

1642702645 is an equidigital number, since it uses as much as digits as its factorization.

1642702645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102659.

The product of its (nonzero) digits is 80640, while the sum is 37.

The square root of 1642702645 is about 40530.2682571927. The cubic root of 1642702645 is about 1179.9211488534.

It can be divided in two parts, 16 and 42702645, that added together give a triangular number (42702661 = T₉₂₄₁).

The spelling of 1642702645 in words is "one billion, six hundred forty-two million, seven hundred two thousand, six hundred forty-five".