4778640465072 has 80 divisors (see below), whose sum is σ = 12529737962112. Its totient is φ = 1569022456320.

The previous prime is 4778640465061. The next prime is 4778640465073. The reversal of 4778640465072 is 2705640468774.

It is a junction number, because it is equal to n+sod(n) for n = 4778640464997 and 4778640465015.

It is not an unprimeable number, because it can be changed into a prime (4778640465073) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99578748 + ... + 99626724.

Almost surely, 2^{4778640465072} is an apocalyptic number.

It is an amenable number.

4778640465072 is an abundant number, since it is smaller than the sum of its proper divisors (7751097497040).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4778640465072 is a wasteful number, since it uses less digits than its factorization.

4778640465072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79026 (or 79020 counting only the distinct ones).

The product of its (nonzero) digits is 63221760, while the sum is 60.

The spelling of 4778640465072 in words is "four trillion, seven hundred seventy-eight billion, six hundred forty million, four hundred sixty-five thousand, seventy-two".