211620506116556 has 6 divisors (see below), whose sum is σ = 370335885703980. Its totient is φ = 105810253058276.

The previous prime is 211620506116541. The next prime is 211620506116561. The reversal of 211620506116556 is 655611605026112.

It is a super-2 number, since 2×211620506116556² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 211620506116556.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26452563264566 + ... + 26452563264573.

It is an arithmetic number, because the mean of its divisors is an integer number (61722647617330).

Almost surely, 2^{211620506116556} is an apocalyptic number.

It is an amenable number.

211620506116556 is a deficient number, since it is larger than the sum of its proper divisors (158715379587424).

211620506116556 is a wasteful number, since it uses less digits than its factorization.

211620506116556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52905126529143 (or 52905126529141 counting only the distinct ones).

The product of its (nonzero) digits is 648000, while the sum is 47.

The spelling of 211620506116556 in words is "two hundred eleven trillion, six hundred twenty billion, five hundred six million, one hundred sixteen thousand, five hundred fifty-six".