1642630605 has 32 divisors (see below), whose sum is σ = 3276730368. Its totient is φ = 682651200.

The previous prime is 1642630603. The next prime is 1642630621. The reversal of 1642630605 is 5060362461.

1642630605 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1642630605 - 2¹ = 1642630603 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1642630603) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 709941 + ... + 712250.

It is an arithmetic number, because the mean of its divisors is an integer number (102397824).

Almost surely, 2^1642630605 is an apocalyptic number.

1642630605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1642630605 is a deficient number, since it is larger than the sum of its proper divisors (1634099763).

1642630605 is a wasteful number, since it uses less digits than its factorization.

1642630605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1422217.

The product of its (nonzero) digits is 25920, while the sum is 33.

The square root of 1642630605 is about 40529.3795289294. The cubic root of 1642630605 is about 1179.9039002941.

The spelling of 1642630605 in words is "one billion, six hundred forty-two million, six hundred thirty thousand, six hundred five".