6443987954 has 8 divisors (see below), whose sum is σ = 9672504240. Its totient is φ = 3219819876.

The previous prime is 6443987941. The next prime is 6443987983. The reversal of 6443987954 is 4597893446.

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

It is a super-2 number, since 2×6443987954² = 83049961502594212232, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6443987893 and 6443987902.

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, 1083344 + ... + 1089275.

It is an arithmetic number, because the mean of its divisors is an integer number (1209063030).

Almost surely, 2^6443987954 is an apocalyptic number.

6443987954 is a deficient number, since it is larger than the sum of its proper divisors (3228516286).

6443987954 is a wasteful number, since it uses less digits than its factorization.

6443987954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2174104.

The product of its digits is 26127360, while the sum is 59.

The square root of 6443987954 is about 80274.4539314968. The cubic root of 6443987954 is about 1860.8794501836.

The spelling of 6443987954 in words is "six billion, four hundred forty-three million, nine hundred eighty-seven thousand, nine hundred fifty-four".