9661783086957 has 16 divisors (see below), whose sum is σ = 13373687845440. Its totient is φ = 6197103209472.

The previous prime is 9661783086941. The next prime is 9661783086971. The reversal of 9661783086957 is 7596803871669.

9661783086957 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9661783086957 - 2⁴ = 9661783086941 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9661783085957) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 196185588 + ... + 196234829.

It is an arithmetic number, because the mean of its divisors is an integer number (835855490340).

Almost surely, 2^{9661783086957} is an apocalyptic number.

It is an amenable number.

9661783086957 is a deficient number, since it is larger than the sum of its proper divisors (3711904758483).

9661783086957 is a wasteful number, since it uses less digits than its factorization.

9661783086957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392420732.

The product of its (nonzero) digits is 823011840, while the sum is 75.

The spelling of 9661783086957 in words is "nine trillion, six hundred sixty-one billion, seven hundred eighty-three million, eighty-six thousand, nine hundred fifty-seven".