74676519221 has 2 divisors, whose sum is σ = 74676519222. Its totient is φ = 74676519220.

The previous prime is 74676519199. The next prime is 74676519227. The reversal of 74676519221 is 12291567647.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50809668100 + 23866851121 = 225410^2 + 154489^2 .

It is a cyclic number.

It is not a de Polignac number, because 74676519221 - 2¹⁸ = 74676257077 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 74676519221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74676519227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37338259610 + 37338259611.

It is an arithmetic number, because the mean of its divisors is an integer number (37338259611).

Almost surely, 2^74676519221 is an apocalyptic number.

It is an amenable number.

74676519221 is a deficient number, since it is larger than the sum of its proper divisors (1).

74676519221 is an equidigital number, since it uses as much as digits as its factorization.

74676519221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1270080, while the sum is 50.

The spelling of 74676519221 in words is "seventy-four billion, six hundred seventy-six million, five hundred nineteen thousand, two hundred twenty-one".