1978813678093 has 16 divisors (see below), whose sum is σ = 2339942400000. Its totient is φ = 1637318132352.

The previous prime is 1978813678091. The next prime is 1978813678129. The reversal of 1978813678093 is 3908763188791.

It is not a de Polignac number, because 1978813678093 - 2¹ = 1978813678091 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1978813678091) 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, 87033 + ... + 1991281.

It is an arithmetic number, because the mean of its divisors is an integer number (146246400000).

Almost surely, 2^{1978813678093} is an apocalyptic number.

It is an amenable number.

1978813678093 is a deficient number, since it is larger than the sum of its proper divisors (361128721907).

1978813678093 is a wasteful number, since it uses less digits than its factorization.

1978813678093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1909404.

The product of its (nonzero) digits is 109734912, while the sum is 70.

The spelling of 1978813678093 in words is "one trillion, nine hundred seventy-eight billion, eight hundred thirteen million, six hundred seventy-eight thousand, ninety-three".