1978667810880 has 112 divisors (see below), whose sum is σ = 6314160600000. Its totient is φ = 524966299648.

The previous prime is 1978667810851. The next prime is 1978667810923. The reversal of 1978667810880 is 880187668791.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5042130 + ... + 5420369.

Almost surely, 2^{1978667810880} is an apocalyptic number.

1978667810880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1978667810880 is an abundant number, since it is smaller than the sum of its proper divisors (4335492789120).

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

1978667810880 is a wasteful number, since it uses less digits than its factorization.

1978667810880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10462716 (or 10462706 counting only the distinct ones).

The product of its (nonzero) digits is 65028096, while the sum is 69.

The spelling of 1978667810880 in words is "one trillion, nine hundred seventy-eight billion, six hundred sixty-seven million, eight hundred ten thousand, eight hundred eighty".