6444420154 has 8 divisors (see below), whose sum is σ = 9716716980. Its totient is φ = 3205514496.

The previous prime is 6444420119. The next prime is 6444420187. The reversal of 6444420154 is 4510244446.

It can be written as a sum of positive squares in 2 ways, for example, as 6086340225 + 358079929 = 78015^2 + 18923^2 .

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

It is a super-2 number, since 2×6444420154² = 83061102242562767432, which contains 22 as substring.

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, 8347309 + ... + 8348080.

Almost surely, 2^6444420154 is an apocalyptic number.

6444420154 is a deficient number, since it is larger than the sum of its proper divisors (3272296826).

6444420154 is a wasteful number, since it uses less digits than its factorization.

6444420154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16695584.

The product of its (nonzero) digits is 61440, while the sum is 34.

The square root of 6444420154 is about 80277.1459009350. The cubic root of 6444420154 is about 1860.9210524814.

The spelling of 6444420154 in words is "six billion, four hundred forty-four million, four hundred twenty thousand, one hundred fifty-four".