78454768890 has 48 divisors (see below), whose sum is σ = 190174917024. Its totient is φ = 20714049600.

The previous prime is 78454768867. The next prime is 78454768891. The reversal of 78454768890 is 9886745487.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (78454768891) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 177849 + ... + 434211.

It is an arithmetic number, because the mean of its divisors is an integer number (3961977438).

Almost surely, 2^78454768890 is an apocalyptic number.

78454768890 is an abundant number, since it is smaller than the sum of its proper divisors (111720148134).

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

78454768890 is a wasteful number, since it uses less digits than its factorization.

78454768890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256575 (or 256474 counting only the distinct ones).

The product of its (nonzero) digits is 108380160, while the sum is 66.

The spelling of 78454768890 in words is "seventy-eight billion, four hundred fifty-four million, seven hundred sixty-eight thousand, eight hundred ninety".