6406361642 has 8 divisors (see below), whose sum is σ = 9767076132. Its totient is φ = 3150669600.

The previous prime is 6406361629. The next prime is 6406361657. The reversal of 6406361642 is 2461636046.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 4915552321 + 1490809321 = 70111^2 + 38611^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 6406361596 and 6406361605.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26255459 + ... + 26255702.

Almost surely, 2^6406361642 is an apocalyptic number.

6406361642 is a deficient number, since it is larger than the sum of its proper divisors (3360714490).

6406361642 is a wasteful number, since it uses less digits than its factorization.

6406361642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52511224.

The product of its (nonzero) digits is 124416, while the sum is 38.

The square root of 6406361642 is about 80039.7503869171. The cubic root of 6406361642 is about 1857.2504990316.

Adding to 6406361642 its reverse (2461636046), we get a palindrome (8867997688).

The spelling of 6406361642 in words is "six billion, four hundred six million, three hundred sixty-one thousand, six hundred forty-two".