61152952321 has 4 divisors (see below), whose sum is σ = 61153762644. Its totient is φ = 61152142000.

The previous prime is 61152952271. The next prime is 61152952331. The reversal of 61152952321 is 12325925116.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 33283988721 + 27868963600 = 182439^2 + 166940^2 .

It is a cyclic number.

It is not a de Polignac number, because 61152952321 - 2²³ = 61144563713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61152952331) 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, 278830 + ... + 447271.

It is an arithmetic number, because the mean of its divisors is an integer number (15288440661).

It is a Proth number, since it is equal to 3645 ⋅ 2²⁴ + 1 and 3645 < 2²⁴.

Almost surely, 2^61152952321 is an apocalyptic number.

It is an amenable number.

61152952321 is a deficient number, since it is larger than the sum of its proper divisors (810323).

61152952321 is an equidigital number, since it uses as much as digits as its factorization.

61152952321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 810322.

The product of its digits is 32400, while the sum is 37.

The spelling of 61152952321 in words is "sixty-one billion, one hundred fifty-two million, nine hundred fifty-two thousand, three hundred twenty-one".