1642377745 has 8 divisors (see below), whose sum is σ = 1989988416. Its totient is φ = 1301145456.

The previous prime is 1642377743. The next prime is 1642377811. The reversal of 1642377745 is 5477732461.

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 1642377745 - 2¹ = 1642377743 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1642377695 and 1642377704.

It is not an unprimeable number, because it can be changed into a prime (1642377743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1594027 + ... + 1595056.

It is an arithmetic number, because the mean of its divisors is an integer number (248748552).

Almost surely, 2^1642377745 is an apocalyptic number.

It is an amenable number.

1642377745 is a deficient number, since it is larger than the sum of its proper divisors (347610671).

1642377745 is a wasteful number, since it uses less digits than its factorization.

1642377745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3189191.

The product of its digits is 987840, while the sum is 46.

The square root of 1642377745 is about 40526.2599433997. The cubic root of 1642377745 is about 1179.8433539547.

The spelling of 1642377745 in words is "one billion, six hundred forty-two million, three hundred seventy-seven thousand, seven hundred forty-five".