1516668678 has 96 divisors (see below), whose sum is σ = 3931221600. Its totient is φ = 432165888.

The previous prime is 1516668677. The next prime is 1516668697. The reversal of 1516668678 is 8768666151.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1516668677) 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, 1632118 + ... + 1633046.

It is an arithmetic number, because the mean of its divisors is an integer number (40950225).

Almost surely, 2^1516668678 is an apocalyptic number.

1516668678 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1516668678, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1965610800).

1516668678 is an abundant number, since it is smaller than the sum of its proper divisors (2414552922).

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

1516668678 is a wasteful number, since it uses less digits than its factorization.

1516668678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1571 (or 1558 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 54.

The square root of 1516668678 is about 38944.4306416206. The cubic root of 1516668678 is about 1148.9388265122.

The spelling of 1516668678 in words is "one billion, five hundred sixteen million, six hundred sixty-eight thousand, six hundred seventy-eight".