1642600553 has 4 divisors (see below), whose sum is σ = 1791927888. Its totient is φ = 1493273220.

The previous prime is 1642600529. The next prime is 1642600567. The reversal of 1642600553 is 3550062461.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3550062461 = 11 ⋅322732951.

It is a cyclic number.

It is not a de Polignac number, because 1642600553 - 2¹⁰ = 1642599529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1642605553) 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 3 ways as a sum of consecutive naturals, for example, 74663651 + ... + 74663672.

It is an arithmetic number, because the mean of its divisors is an integer number (447981972).

Almost surely, 2^1642600553 is an apocalyptic number.

It is an amenable number.

1642600553 is a deficient number, since it is larger than the sum of its proper divisors (149327335).

1642600553 is a wasteful number, since it uses less digits than its factorization.

1642600553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149327334.

The product of its (nonzero) digits is 21600, while the sum is 32.

The square root of 1642600553 is about 40529.0087838328. The cubic root of 1642600553 is about 1179.8967047854.

The spelling of 1642600553 in words is "one billion, six hundred forty-two million, six hundred thousand, five hundred fifty-three".