61020448521 has 16 divisors (see below), whose sum is σ = 82929397824. Its totient is φ = 39901112064.

The previous prime is 61020448483. The next prime is 61020448529. The reversal of 61020448521 is 12584402016.

It is a happy number.

It is not a de Polignac number, because 61020448521 - 2²¹ = 61018351369 is a prime.

It is a super-2 number, since 2×61020448521² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61020448529) 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, 604636 + ... + 698301.

It is an arithmetic number, because the mean of its divisors is an integer number (5183087364).

Almost surely, 2^61020448521 is an apocalyptic number.

It is an amenable number.

61020448521 is a deficient number, since it is larger than the sum of its proper divisors (21908949303).

61020448521 is a wasteful number, since it uses less digits than its factorization.

61020448521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1303240.

The product of its (nonzero) digits is 15360, while the sum is 33.

The spelling of 61020448521 in words is "sixty-one billion, twenty million, four hundred forty-eight thousand, five hundred twenty-one".