1678619664080 has 80 divisors (see below), whose sum is σ = 3964441688064. Its totient is φ = 660873185280.

The previous prime is 1678619664053. The next prime is 1678619664083. The reversal of 1678619664080 is 804669168761.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1678619664083) 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, 3119057 + ... + 3617423.

Almost surely, 2^{1678619664080} is an apocalyptic number.

1678619664080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1678619664080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1982220844032).

1678619664080 is an abundant number, since it is smaller than the sum of its proper divisors (2285822023984).

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

1678619664080 is a wasteful number, since it uses less digits than its factorization.

1678619664080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499044 (or 499038 counting only the distinct ones).

The product of its (nonzero) digits is 20901888, while the sum is 62.

The spelling of 1678619664080 in words is "one trillion, six hundred seventy-eight billion, six hundred nineteen million, six hundred sixty-four thousand, eighty".