73977223861 has 8 divisors (see below), whose sum is σ = 74800753848. Its totient is φ = 73155480000.

The previous prime is 73977223849. The next prime is 73977223867. The reversal of 73977223861 is 16832277937.

It can be written as a sum of positive squares in 4 ways, for example, as 7944156900 + 66033066961 = 89130^2 + 256969^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 73977223861 - 2¹⁷ = 73977092789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73977223867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 363150 + ... + 528991.

It is an arithmetic number, because the mean of its divisors is an integer number (9350094231).

Almost surely, 2^73977223861 is an apocalyptic number.

It is an amenable number.

73977223861 is a deficient number, since it is larger than the sum of its proper divisors (823529987).

73977223861 is a wasteful number, since it uses less digits than its factorization.

73977223861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 893063.

The product of its digits is 5334336, while the sum is 55.

The spelling of 73977223861 in words is "seventy-three billion, nine hundred seventy-seven million, two hundred twenty-three thousand, eight hundred sixty-one".