74784521235401 has 2 divisors, whose sum is σ = 74784521235402. Its totient is φ = 74784521235400.

The previous prime is 74784521235349. The next prime is 74784521235481. The reversal of 74784521235401 is 10453212548747.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70540513345600 + 4244007889801 = 8398840^2 + 2060099^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74784521235401 is a prime.

It is a super-2 number, since 2×74784521235401² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (74784521235481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37392260617700 + 37392260617701.

It is an arithmetic number, because the mean of its divisors is an integer number (37392260617701).

Almost surely, 2^{74784521235401} is an apocalyptic number.

It is an amenable number.

74784521235401 is a deficient number, since it is larger than the sum of its proper divisors (1).

74784521235401 is an equidigital number, since it uses as much as digits as its factorization.

74784521235401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7526400, while the sum is 53.

The spelling of 74784521235401 in words is "seventy-four trillion, seven hundred eighty-four billion, five hundred twenty-one million, two hundred thirty-five thousand, four hundred one".