1978151860078 has 8 divisors (see below), whose sum is σ = 3007874746368. Its totient is φ = 975526944624.

The previous prime is 1978151860033. The next prime is 1978151860141. The reversal of 1978151860078 is 8700681518791.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 1978151859998 and 1978151860025.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6774492526 + ... + 6774492817.

It is an arithmetic number, because the mean of its divisors is an integer number (375984343296).

Almost surely, 2^{1978151860078} is an apocalyptic number.

1978151860078 is a deficient number, since it is larger than the sum of its proper divisors (1029722886290).

1978151860078 is a wasteful number, since it uses less digits than its factorization.

1978151860078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13548985418.

The product of its (nonzero) digits is 6773760, while the sum is 61.

The spelling of 1978151860078 in words is "one trillion, nine hundred seventy-eight billion, one hundred fifty-one million, eight hundred sixty thousand, seventy-eight".