74721263616001 has 2 divisors, whose sum is σ = 74721263616002. Its totient is φ = 74721263616000.

The previous prime is 74721263615953. The next prime is 74721263616011. The reversal of 74721263616001 is 10061636212747.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65690781850225 + 9030481765776 = 8104985^2 + 3005076^2 .

It is a cyclic number.

It is not a de Polignac number, because 74721263616001 - 2⁴⁵ = 39536891527169 is a prime.

It is not a weakly prime, because it can be changed into another prime (74721263616011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37360631808000 + 37360631808001.

It is an arithmetic number, because the mean of its divisors is an integer number (37360631808001).

Almost surely, 2^{74721263616001} is an apocalyptic number.

It is an amenable number.

74721263616001 is a deficient number, since it is larger than the sum of its proper divisors (1).

74721263616001 is an equidigital number, since it uses as much as digits as its factorization.

74721263616001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 508032, while the sum is 46.

Adding to 74721263616001 its reverse (10061636212747), we get a palindrome (84782899828748).

The spelling of 74721263616001 in words is "seventy-four trillion, seven hundred twenty-one billion, two hundred sixty-three million, six hundred sixteen thousand, one".