1642632465 has 32 divisors (see below), whose sum is σ = 2699136000. Its totient is φ = 852578496.

The previous prime is 1642632389. The next prime is 1642632491. The reversal of 1642632465 is 5642362461.

It is not a de Polignac number, because 1642632465 - 2¹¹ = 1642630417 is a prime.

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 31 ways as a sum of consecutive naturals, for example, 178036 + ... + 187034.

It is an arithmetic number, because the mean of its divisors is an integer number (84348000).

Almost surely, 2^1642632465 is an apocalyptic number.

1642632465 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1642632465 is a deficient number, since it is larger than the sum of its proper divisors (1056503535).

1642632465 is a wasteful number, since it uses less digits than its factorization.

1642632465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9333.

The product of its digits is 207360, while the sum is 39.

The square root of 1642632465 is about 40529.4024752401. The cubic root of 1642632465 is about 1179.9043456408.

The spelling of 1642632465 in words is "one billion, six hundred forty-two million, six hundred thirty-two thousand, four hundred sixty-five".