1956865612078 has 24 divisors (see below), whose sum is σ = 3225898961208. Its totient is φ = 889688603232.

The previous prime is 1956865612057. The next prime is 1956865612081. The reversal of 1956865612078 is 8702165686591.

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 11 ways as a sum of consecutive naturals, for example, 43182901 + ... + 43228192.

It is an arithmetic number, because the mean of its divisors is an integer number (134412456717).

Almost surely, 2^{1956865612078} is an apocalyptic number.

1956865612078 is a deficient number, since it is larger than the sum of its proper divisors (1269033349130).

1956865612078 is a wasteful number, since it uses less digits than its factorization.

1956865612078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86411188 (or 86411175 counting only the distinct ones).

The product of its (nonzero) digits is 43545600, while the sum is 64.

The spelling of 1956865612078 in words is "one trillion, nine hundred fifty-six billion, eight hundred sixty-five million, six hundred twelve thousand, seventy-eight".