61210850320521 has 48 divisors (see below), whose sum is σ = 96774173496000. Its totient is φ = 36974299950720.

The previous prime is 61210850320447. The next prime is 61210850320523. The reversal of 61210850320521 is 12502305801216.

61210850320521 is a `hidden beast` number, since 6 + 1 + 2 + 108 + 5 + 0 + 3 + 20 + 521 = 666.

It is not a de Polignac number, because 61210850320521 - 2⁷ = 61210850320393 is a prime.

It is a super-2 number, since 2×61210850320521² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61210850320523) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 43652995 + ... + 45033383.

It is an arithmetic number, because the mean of its divisors is an integer number (2016128614500).

Almost surely, 2^{61210850320521} is an apocalyptic number.

It is an amenable number.

61210850320521 is a deficient number, since it is larger than the sum of its proper divisors (35563323175479).

61210850320521 is a wasteful number, since it uses less digits than its factorization.

61210850320521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1381894 (or 1381891 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The spelling of 61210850320521 in words is "sixty-one trillion, two hundred ten billion, eight hundred fifty million, three hundred twenty thousand, five hundred twenty-one".