6991761554748 has 36 divisors (see below), whose sum is σ = 18104683379328. Its totient is φ = 2273743594560.

The previous prime is 6991761554747. The next prime is 6991761554753. The reversal of 6991761554748 is 8474551671996.

6991761554748 is a `hidden beast` number, since 6 + 9 + 9 + 1 + 7 + 61 + 554 + 7 + 4 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6991761554747) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2368481436 + ... + 2368484387.

It is an arithmetic number, because the mean of its divisors is an integer number (502907871648).

Almost surely, 2^{6991761554748} is an apocalyptic number.

It is an amenable number.

6991761554748 is an abundant number, since it is smaller than the sum of its proper divisors (11112921824580).

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

6991761554748 is a wasteful number, since it uses less digits than its factorization.

6991761554748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4736965874 (or 4736965869 counting only the distinct ones).

The product of its digits is 457228800, while the sum is 72.

The spelling of 6991761554748 in words is "six trillion, nine hundred ninety-one billion, seven hundred sixty-one million, five hundred fifty-four thousand, seven hundred forty-eight".