6444420153 has 8 divisors (see below), whose sum is σ = 8594478048. Its totient is φ = 4295321184.

The previous prime is 6444420119. The next prime is 6444420187. The reversal of 6444420153 is 3510244446.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (6444420119) and next prime (6444420187).

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

It is not a de Polignac number, because 6444420153 - 2¹² = 6444416057 is a prime.

It is a super-2 number, since 2×6444420153² = 83061102216785086818, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6444420053) 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, 223900 + ... + 251037.

It is an arithmetic number, because the mean of its divisors is an integer number (1074309756).

Almost surely, 2^6444420153 is an apocalyptic number.

It is an amenable number.

6444420153 is a deficient number, since it is larger than the sum of its proper divisors (2150057895).

6444420153 is a wasteful number, since it uses less digits than its factorization.

6444420153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479463.

The product of its (nonzero) digits is 46080, while the sum is 33.

The square root of 6444420153 is about 80277.1458947065. The cubic root of 6444420153 is about 1860.9210523852.

Adding to 6444420153 its reverse (3510244446), we get a palindrome (9954664599).

The spelling of 6444420153 in words is "six billion, four hundred forty-four million, four hundred twenty thousand, one hundred fifty-three".