212661623661048 has 48 divisors (see below), whose sum is σ = 606272172721800. Its totient is φ = 67156302208320.

The previous prime is 212661623661013. The next prime is 212661623661049. The reversal of 212661623661048 is 840166326166212.

212661623661048 is a `hidden beast` number, since 2 + 1 + 2 + 6 + 6 + 1 + 623 + 6 + 6 + 1 + 0 + 4 + 8 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 212661623660985 and 212661623661003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212661623661049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 77727200263 + ... + 77727202998.

Almost surely, 2^{212661623661048} is an apocalyptic number.

It is an amenable number.

212661623661048 is an abundant number, since it is smaller than the sum of its proper divisors (393610549060752).

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

212661623661048 is a wasteful number, since it uses less digits than its factorization.

212661623661048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155454403292 (or 155454403285 counting only the distinct ones).

The product of its (nonzero) digits is 5971968, while the sum is 54.

The spelling of 212661623661048 in words is "two hundred twelve trillion, six hundred sixty-one billion, six hundred twenty-three million, six hundred sixty-one thousand, forty-eight".