56421963021716 has 12 divisors (see below), whose sum is σ = 98741157333588. Its totient is φ = 28210203783552.

The previous prime is 56421963021703. The next prime is 56421963021727. The reversal of 56421963021716 is 61712036912465.

It can be written as a sum of positive squares in 2 ways, for example, as 40396320756100 + 16025642265616 = 6355810^2 + 4003204^2 .

It is a super-2 number, since 2×56421963021716² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 194268581 + ... + 194558796.

It is an arithmetic number, because the mean of its divisors is an integer number (8228429777799).

Almost surely, 2^{56421963021716} is an apocalyptic number.

It is an amenable number.

56421963021716 is a deficient number, since it is larger than the sum of its proper divisors (42319194311872).

56421963021716 is a wasteful number, since it uses less digits than its factorization.

56421963021716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388863658 (or 388863656 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 53.

The spelling of 56421963021716 in words is "fifty-six trillion, four hundred twenty-one billion, nine hundred sixty-three million, twenty-one thousand, seven hundred sixteen".