74356874621 has 2 divisors, whose sum is σ = 74356874622. Its totient is φ = 74356874620.

The previous prime is 74356874573. The next prime is 74356874663. The reversal of 74356874621 is 12647865347.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52729936900 + 21626937721 = 229630^2 + 147061^2 .

It is a cyclic number.

It is not a de Polignac number, because 74356874621 - 2¹⁴ = 74356858237 is a prime.

It is a super-3 number, since 3×74356874621³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74356879621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37178437310 + 37178437311.

It is an arithmetic number, because the mean of its divisors is an integer number (37178437311).

Almost surely, 2^74356874621 is an apocalyptic number.

It is an amenable number.

74356874621 is a deficient number, since it is larger than the sum of its proper divisors (1).

74356874621 is an equidigital number, since it uses as much as digits as its factorization.

74356874621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6773760, while the sum is 53.

The spelling of 74356874621 in words is "seventy-four billion, three hundred fifty-six million, eight hundred seventy-four thousand, six hundred twenty-one".