521561241661102 has 16 divisors (see below), whose sum is σ = 786080022598800. Its totient is φ = 259534662992640.

The previous prime is 521561241661091. The next prime is 521561241661111. The reversal of 521561241661102 is 201166142165125.

It is a super-2 number, since 2×521561241661102² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12944577 + ... + 34794892.

It is an arithmetic number, because the mean of its divisors is an integer number (49130001412425).

Almost surely, 2^{521561241661102} is an apocalyptic number.

521561241661102 is a deficient number, since it is larger than the sum of its proper divisors (264518780937698).

521561241661102 is a wasteful number, since it uses less digits than its factorization.

521561241661102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47765571.

The product of its (nonzero) digits is 172800, while the sum is 43.

The spelling of 521561241661102 in words is "five hundred twenty-one trillion, five hundred sixty-one billion, two hundred forty-one million, six hundred sixty-one thousand, one hundred two".