642611445 has 32 divisors (see below), whose sum is σ = 1236910080. Its totient is φ = 278303040.

The previous prime is 642611443. The next prime is 642611447. The reversal of 642611445 is 544116246.

It is an interprime number because it is at equal distance from previous prime (642611443) and next prime (642611447).

It is not a de Polignac number, because 642611445 - 2¹ = 642611443 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642611443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 159061 + ... + 163050.

It is an arithmetic number, because the mean of its divisors is an integer number (38653440).

Almost surely, 2^642611445 is an apocalyptic number.

It is an amenable number.

642611445 is a deficient number, since it is larger than the sum of its proper divisors (594298635).

642611445 is a wasteful number, since it uses less digits than its factorization.

642611445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322145.

The product of its digits is 23040, while the sum is 33.

The square root of 642611445 is about 25349.7819517249. The cubic root of 642611445 is about 862.9444078181.

It can be divided in two parts, 6426 and 11445, that added together give a palindrome (17871).

The spelling of 642611445 in words is "six hundred forty-two million, six hundred eleven thousand, four hundred forty-five".