6181636042 has 4 divisors (see below), whose sum is σ = 9272454066. Its totient is φ = 3090818020.

The previous prime is 6181636031. The next prime is 6181636057. The reversal of 6181636042 is 2406361816.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 4953203641 + 1228432401 = 70379^2 + 35049^2 .

It is a junction number, because it is equal to n+sod(n) for n = 6181635992 and 6181636010.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1545409009 + ... + 1545409012.

Almost surely, 2^6181636042 is an apocalyptic number.

6181636042 is a deficient number, since it is larger than the sum of its proper divisors (3090818024).

6181636042 is a wasteful number, since it uses less digits than its factorization.

6181636042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3090818023.

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 6181636042 is about 78623.3810135382. The cubic root of 6181636042 is about 1835.2749792214.

Adding to 6181636042 its reverse (2406361816), we get a palindrome (8587997858).

The spelling of 6181636042 in words is "six billion, one hundred eighty-one million, six hundred thirty-six thousand, forty-two".