61223097813791 has 4 divisors (see below), whose sum is σ = 64445366119800. Its totient is φ = 58000829507784.

The previous prime is 61223097813769. The next prime is 61223097813821. The reversal of 61223097813791 is 19731879032216.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61223097813791 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61223097813791.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61223097813751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1611134152976 + ... + 1611134153013.

It is an arithmetic number, because the mean of its divisors is an integer number (16111341529950).

Almost surely, 2^{61223097813791} is an apocalyptic number.

61223097813791 is a deficient number, since it is larger than the sum of its proper divisors (3222268306009).

61223097813791 is a wasteful number, since it uses less digits than its factorization.

61223097813791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3222268306008.

The product of its (nonzero) digits is 6858432, while the sum is 59.

The spelling of 61223097813791 in words is "sixty-one trillion, two hundred twenty-three billion, ninety-seven million, eight hundred thirteen thousand, seven hundred ninety-one".