678945112290 has 32 divisors (see below), whose sum is σ = 1810520300160. Its totient is φ = 181052029872.

The previous prime is 678945112273. The next prime is 678945112291. The reversal of 678945112290 is 92211549876.

It is a happy number.

678945112290 is a `hidden beast` number, since 6 + 7 + 89 + 451 + 1 + 22 + 90 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (678945112291) 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, 1257305494 + ... + 1257306033.

It is an arithmetic number, because the mean of its divisors is an integer number (56578759380).

Almost surely, 2^678945112290 is an apocalyptic number.

678945112290 is an abundant number, since it is smaller than the sum of its proper divisors (1131575187870).

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

678945112290 is a wasteful number, since it uses less digits than its factorization.

678945112290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2514611543 (or 2514611537 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 54.

The spelling of 678945112290 in words is "six hundred seventy-eight billion, nine hundred forty-five million, one hundred twelve thousand, two hundred ninety".