1956704879378 has 18 divisors (see below), whose sum is σ = 3032885811303. Its totient is φ = 946763010060.

The previous prime is 1956704879377. The next prime is 1956704879407. The reversal of 1956704879378 is 8739784076591.

It can be written as a sum of positive squares in only one way, i.e., 978352439689 + 978352439689 = 989117^2 + 989117^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=989117.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1956704879377) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 61309301 + ... + 61341207.

Almost surely, 2^{1956704879378} is an apocalyptic number.

1956704879378 is a deficient number, since it is larger than the sum of its proper divisors (1076180931925).

1956704879378 is an frugal number, since it uses more digits than its factorization.

1956704879378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63878 (or 31940 counting only the distinct ones).

The product of its (nonzero) digits is 640120320, while the sum is 74.

The spelling of 1956704879378 in words is "one trillion, nine hundred fifty-six billion, seven hundred four million, eight hundred seventy-nine thousand, three hundred seventy-eight".