61013525321 has 4 divisors (see below), whose sum is σ = 69729743232. Its totient is φ = 52297307412.

The previous prime is 61013525291. The next prime is 61013525329. The reversal of 61013525321 is 12352531016.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-61013525321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61013525329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4358108945 + ... + 4358108958.

It is an arithmetic number, because the mean of its divisors is an integer number (17432435808).

Almost surely, 2^61013525321 is an apocalyptic number.

It is an amenable number.

61013525321 is a deficient number, since it is larger than the sum of its proper divisors (8716217911).

61013525321 is an equidigital number, since it uses as much as digits as its factorization.

61013525321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8716217910.

The product of its (nonzero) digits is 5400, while the sum is 29.

The spelling of 61013525321 in words is "sixty-one billion, thirteen million, five hundred twenty-five thousand, three hundred twenty-one".