8478001639478 has 64 divisors (see below), whose sum is σ = 15263398080000. Its totient is φ = 3528810042912.

The previous prime is 8478001639469. The next prime is 8478001639483. The reversal of 8478001639478 is 8749361008748.

It is a super-2 number, since 2×8478001639478² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2097488 + ... + 4621196.

It is an arithmetic number, because the mean of its divisors is an integer number (238490595000).

Almost surely, 2^{8478001639478} is an apocalyptic number.

8478001639478 is a deficient number, since it is larger than the sum of its proper divisors (6785396440522).

8478001639478 is a wasteful number, since it uses less digits than its factorization.

8478001639478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2523874 (or 2523860 counting only the distinct ones).

The product of its (nonzero) digits is 65028096, while the sum is 65.

The spelling of 8478001639478 in words is "eight trillion, four hundred seventy-eight billion, one million, six hundred thirty-nine thousand, four hundred seventy-eight".