1642377265 has 4 divisors (see below), whose sum is σ = 1970852724. Its totient is φ = 1313901808.

The previous prime is 1642377257. The next prime is 1642377283. The reversal of 1642377265 is 5627732461.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 220106896 + 1422270369 = 14836^2 + 37713^2 .

It is a cyclic number.

It is not a de Polignac number, because 1642377265 - 2³ = 1642377257 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 164237722 + ... + 164237731.

It is an arithmetic number, because the mean of its divisors is an integer number (492713181).

Almost surely, 2^1642377265 is an apocalyptic number.

It is an amenable number.

1642377265 is a deficient number, since it is larger than the sum of its proper divisors (328475459).

1642377265 is an equidigital number, since it uses as much as digits as its factorization.

1642377265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328475458.

The product of its digits is 423360, while the sum is 43.

The square root of 1642377265 is about 40526.2540213131. The cubic root of 1642377265 is about 1179.8432390146.

The spelling of 1642377265 in words is "one billion, six hundred forty-two million, three hundred seventy-seven thousand, two hundred sixty-five".