61373135321 has 4 divisors (see below), whose sum is σ = 61375918500. Its totient is φ = 61370352144.

The previous prime is 61373135309. The next prime is 61373135333. The reversal of 61373135321 is 12353137316.

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

It is an interprime number because it is at equal distance from previous prime (61373135309) and next prime (61373135333).

It can be written as a sum of positive squares in 2 ways, for example, as 12777137296 + 48595998025 = 113036^2 + 220445^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61373135321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61373135521) 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, 1358246 + ... + 1402703.

It is an arithmetic number, because the mean of its divisors is an integer number (15343979625).

Almost surely, 2^61373135321 is an apocalyptic number.

It is an amenable number.

61373135321 is a deficient number, since it is larger than the sum of its proper divisors (2783179).

61373135321 is a wasteful number, since it uses less digits than its factorization.

61373135321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2783178.

The product of its digits is 34020, while the sum is 35.

The spelling of 61373135321 in words is "sixty-one billion, three hundred seventy-three million, one hundred thirty-five thousand, three hundred twenty-one".