2478643628812 has 18 divisors (see below), whose sum is σ = 4696956345228. Its totient is φ = 1143989366832.

The previous prime is 2478643628807. The next prime is 2478643628837. The reversal of 2478643628812 is 2188263468742.

It is a happy number.

It is a super-2 number, since 2×2478643628812² (a number of 26 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1833315618 + ... + 1833316969.

Almost surely, 2^{2478643628812} is an apocalyptic number.

It is an amenable number.

2478643628812 is a deficient number, since it is larger than the sum of its proper divisors (2218312716416).

2478643628812 is a wasteful number, since it uses less digits than its factorization.

2478643628812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3666632617 (or 3666632602 counting only the distinct ones).

The product of its digits is 49545216, while the sum is 61.

The spelling of 2478643628812 in words is "two trillion, four hundred seventy-eight billion, six hundred forty-three million, six hundred twenty-eight thousand, eight hundred twelve".