6420243153 has 8 divisors (see below), whose sum is σ = 8567294400. Its totient is φ = 4276677008.

The previous prime is 6420243149. The next prime is 6420243157. The reversal of 6420243153 is 3513420246.

It is an interprime number because it is at equal distance from previous prime (6420243149) and next prime (6420243157).

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

It is a cyclic number.

It is not a de Polignac number, because 6420243153 - 2² = 6420243149 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6420243153.

It is not an unprimeable number, because it can be changed into a prime (6420243157) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 866973 + ... + 874346.

It is an arithmetic number, because the mean of its divisors is an integer number (1070911800).

Almost surely, 2^6420243153 is an apocalyptic number.

It is an amenable number.

6420243153 is a deficient number, since it is larger than the sum of its proper divisors (2147051247).

6420243153 is a wasteful number, since it uses less digits than its factorization.

6420243153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1742551.

The product of its (nonzero) digits is 17280, while the sum is 30.

The square root of 6420243153 is about 80126.4198189336. The cubic root of 6420243153 is about 1858.5909813887.

Adding to 6420243153 its reverse (3513420246), we get a palindrome (9933663399).

The spelling of 6420243153 in words is "six billion, four hundred twenty million, two hundred forty-three thousand, one hundred fifty-three".