6878401072578 has 96 divisors (see below), whose sum is σ = 17621015218560. Its totient is φ = 1897332111360.

The previous prime is 6878401072573. The next prime is 6878401072591. The reversal of 6878401072578 is 8752701048786.

6878401072578 is a `hidden beast` number, since 6 + 8 + 7 + 8 + 40 + 10 + 7 + 2 + 578 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6878401072573) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 47872401 + ... + 48015867.

It is an arithmetic number, because the mean of its divisors is an integer number (183552241860).

Almost surely, 2^{6878401072578} is an apocalyptic number.

6878401072578 is an abundant number, since it is smaller than the sum of its proper divisors (10742614145982).

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

6878401072578 is a wasteful number, since it uses less digits than its factorization.

6878401072578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156632 (or 156629 counting only the distinct ones).

The product of its (nonzero) digits is 42147840, while the sum is 63.

The spelling of 6878401072578 in words is "six trillion, eight hundred seventy-eight billion, four hundred one million, seventy-two thousand, five hundred seventy-eight".