74055302821 has 2 divisors, whose sum is σ = 74055302822. Its totient is φ = 74055302820.

The previous prime is 74055302813. The next prime is 74055302831. The reversal of 74055302821 is 12820355047.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60621333796 + 13433969025 = 246214^2 + 115905^2 .

It is a cyclic number.

It is not a de Polignac number, because 74055302821 - 2³ = 74055302813 is a prime.

It is a super-3 number, since 3×74055302821³ (a number of 34 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74055302831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37027651410 + 37027651411.

It is an arithmetic number, because the mean of its divisors is an integer number (37027651411).

Almost surely, 2^74055302821 is an apocalyptic number.

It is an amenable number.

74055302821 is a deficient number, since it is larger than the sum of its proper divisors (1).

74055302821 is an equidigital number, since it uses as much as digits as its factorization.

74055302821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 67200, while the sum is 37.

Adding to 74055302821 its reverse (12820355047), we get a palindrome (86875657868).

The spelling of 74055302821 in words is "seventy-four billion, fifty-five million, three hundred two thousand, eight hundred twenty-one".