6402105511 has 4 divisors (see below), whose sum is σ = 6622867800. Its totient is φ = 6181343224.

The previous prime is 6402105509. The next prime is 6402105527. The reversal of 6402105511 is 1155012046.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1155012046 = 2 ⋅577506023.

It is a cyclic number.

It is not a de Polignac number, because 6402105511 - 2¹ = 6402105509 is a prime.

It is a super-2 number, since 2×6402105511² = 81973909947953142242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6402145511) 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 3 ways as a sum of consecutive naturals, for example, 110381101 + ... + 110381158.

It is an arithmetic number, because the mean of its divisors is an integer number (1655716950).

Almost surely, 2^6402105511 is an apocalyptic number.

6402105511 is a deficient number, since it is larger than the sum of its proper divisors (220762289).

6402105511 is a wasteful number, since it uses less digits than its factorization.

6402105511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220762288.

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 6402105511 is about 80013.1583616095. The cubic root of 6402105511 is about 1856.8391135456.

Adding to 6402105511 its reverse (1155012046), we get a palindrome (7557117557).

The spelling of 6402105511 in words is "six billion, four hundred two million, one hundred five thousand, five hundred eleven".