61520211522 has 48 divisors (see below), whose sum is σ = 166184471232. Its totient is φ = 15979275360.

The previous prime is 61520211463. The next prime is 61520211523. The reversal of 61520211522 is 22511202516.

61520211522 is a `hidden beast` number, since 6 + 1 + 520 + 2 + 115 + 22 = 666.

It is not an unprimeable number, because it can be changed into a prime (61520211523) 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 23 ways as a sum of consecutive naturals, for example, 22192053 + ... + 22194824.

It is an arithmetic number, because the mean of its divisors is an integer number (3462176484).

Almost surely, 2^61520211522 is an apocalyptic number.

61520211522 is an abundant number, since it is smaller than the sum of its proper divisors (104664259710).

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

61520211522 is a wasteful number, since it uses less digits than its factorization.

61520211522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44386903 (or 44386900 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The spelling of 61520211522 in words is "sixty-one billion, five hundred twenty million, two hundred eleven thousand, five hundred twenty-two".