7874778020756 has 6 divisors (see below), whose sum is σ = 13780861536330. Its totient is φ = 3937389010376.

The previous prime is 7874778020699. The next prime is 7874778020773. The reversal of 7874778020756 is 6570208774787.

It can be written as a sum of positive squares in only one way, i.e., 7843248336400 + 31529684356 = 2800580^2 + 177566^2 .

It is a super-3 number, since 3×7874778020756³ (a number of 40 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 984347252591 + ... + 984347252598.

It is an arithmetic number, because the mean of its divisors is an integer number (2296810256055).

Almost surely, 2^{7874778020756} is an apocalyptic number.

It is an amenable number.

7874778020756 is a deficient number, since it is larger than the sum of its proper divisors (5906083515574).

7874778020756 is a wasteful number, since it uses less digits than its factorization.

7874778020756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1968694505193 (or 1968694505191 counting only the distinct ones).

The product of its (nonzero) digits is 258155520, while the sum is 68.

The spelling of 7874778020756 in words is "seven trillion, eight hundred seventy-four billion, seven hundred seventy-eight million, twenty thousand, seven hundred fifty-six".