1978151860080 has 360 divisors, whose sum is σ = 7305398768304. Its totient is φ = 479337492480.

The previous prime is 1978151860033. The next prime is 1978151860141. The reversal of 1978151860080 is 800681518791.

It is a happy number.

1978151860080 is a `hidden beast` number, since 1 + 9 + 7 + 8 + 15 + 18 + 600 + 8 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (360).

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 1978151859999 and 1978151860026.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 289496344 + ... + 289503176.

Almost surely, 2^{1978151860080} is an apocalyptic number.

1978151860080 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 1978151860080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3652699384152).

1978151860080 is an abundant number, since it is smaller than the sum of its proper divisors (5327246908224).

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

1978151860080 is a wasteful number, since it uses less digits than its factorization.

1978151860080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10197 (or 10177 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 54.

The spelling of 1978151860080 in words is "one trillion, nine hundred seventy-eight billion, one hundred fifty-one million, eight hundred sixty thousand, eighty".