4451691842 has 24 divisors (see below), whose sum is σ = 7639101876. Its totient is φ = 1933763328.

The previous prime is 4451691833. The next prime is 4451691847. The reversal of 4451691842 is 2481961544.

It is a Cunningham number, because it is equal to 66721²+1.

It can be written as a sum of positive squares in 6 ways, for example, as 3093695641 + 1357996201 = 55621^2 + 36851^2 .

It is a super-2 number, since 2×4451691842² = 39635120512258705928, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 4451691793 and 4451691802.

It is not an unprimeable number, because it can be changed into a prime (4451691847) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 288713 + ... + 303740.

Almost surely, 2^4451691842 is an apocalyptic number.

4451691842 is a deficient number, since it is larger than the sum of its proper divisors (3187410034).

4451691842 is a wasteful number, since it uses less digits than its factorization.

4451691842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 592502 (or 592485 counting only the distinct ones).

The product of its digits is 276480, while the sum is 44.

The square root of 4451691842 is about 66721.0000074939. Note that the first 5 decimals coincide. The cubic root of 4451691842 is about 1645.0345785299.

The spelling of 4451691842 in words is "four billion, four hundred fifty-one million, six hundred ninety-one thousand, eight hundred forty-two".