6402156242 has 32 divisors (see below), whose sum is σ = 10295812800. Its totient is φ = 2975182848.

The previous prime is 6402156223. The next prime is 6402156247. The reversal of 6402156242 is 2426512046.

It is a junction number, because it is equal to n+sod(n) for n = 6402156199 and 6402156208.

It is not an unprimeable number, because it can be changed into a prime (6402156247) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 908609 + ... + 915627.

It is an arithmetic number, because the mean of its divisors is an integer number (321744150).

Almost surely, 2^6402156242 is an apocalyptic number.

6402156242 is a deficient number, since it is larger than the sum of its proper divisors (3893656558).

6402156242 is a wasteful number, since it uses less digits than its factorization.

6402156242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7370.

The product of its (nonzero) digits is 23040, while the sum is 32.

The square root of 6402156242 is about 80013.4753775887. The cubic root of 6402156242 is about 1856.8440181329.

Adding to 6402156242 its reverse (2426512046), we get a palindrome (8828668288).

The spelling of 6402156242 in words is "six billion, four hundred two million, one hundred fifty-six thousand, two hundred forty-two".