61334689521 has 16 divisors (see below), whose sum is σ = 98960171904. Its totient is φ = 32986723584.

The previous prime is 61334689511. The next prime is 61334689523. The reversal of 61334689521 is 12598643316.

It is not a de Polignac number, because 61334689521 - 2⁵ = 61334689489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61334689523) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85902570 + ... + 85903283.

It is an arithmetic number, because the mean of its divisors is an integer number (6185010744).

Almost surely, 2^61334689521 is an apocalyptic number.

It is an amenable number.

61334689521 is a deficient number, since it is larger than the sum of its proper divisors (37625482383).

61334689521 is a wasteful number, since it uses less digits than its factorization.

61334689521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171805880.

The product of its digits is 933120, while the sum is 48.

The spelling of 61334689521 in words is "sixty-one billion, three hundred thirty-four million, six hundred eighty-nine thousand, five hundred twenty-one".