74367169421 has 2 divisors, whose sum is σ = 74367169422. Its totient is φ = 74367169420.

The previous prime is 74367169417. The next prime is 74367169427. The reversal of 74367169421 is 12496176347.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57821492521 + 16545676900 = 240461^2 + 128630^2 .

It is an emirp because it is prime and its reverse (12496176347) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 74367169421 - 2² = 74367169417 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 74367169421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74367169427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37183584710 + 37183584711.

It is an arithmetic number, because the mean of its divisors is an integer number (37183584711).

Almost surely, 2^74367169421 is an apocalyptic number.

It is an amenable number.

74367169421 is a deficient number, since it is larger than the sum of its proper divisors (1).

74367169421 is an equidigital number, since it uses as much as digits as its factorization.

74367169421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1524096, while the sum is 50.

The spelling of 74367169421 in words is "seventy-four billion, three hundred sixty-seven million, one hundred sixty-nine thousand, four hundred twenty-one".