1940778926544 has 40 divisors (see below), whose sum is σ = 5175410474752. Its totient is φ = 626057717760.

The previous prime is 1940778926531. The next prime is 1940778926599. The reversal of 1940778926544 is 4456298770491.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 652141969 + ... + 652144944.

Almost surely, 2^{1940778926544} is an apocalyptic number.

It is an amenable number.

1940778926544 is an abundant number, since it is smaller than the sum of its proper divisors (3234631548208).

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

1940778926544 is a wasteful number, since it uses less digits than its factorization.

1940778926544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1304286955 (or 1304286949 counting only the distinct ones).

The product of its (nonzero) digits is 121927680, while the sum is 66.

The spelling of 1940778926544 in words is "one trillion, nine hundred forty billion, seven hundred seventy-eight million, nine hundred twenty-six thousand, five hundred forty-four".