74836754521 has 2 divisors, whose sum is σ = 74836754522. Its totient is φ = 74836754520.

The previous prime is 74836754479. The next prime is 74836754539. The reversal of 74836754521 is 12545763847.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55001975625 + 19834778896 = 234525^2 + 140836^2 .

It is an emirp because it is prime and its reverse (12545763847) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 74836754521 - 2¹³ = 74836746329 is a prime.

It is not a weakly prime, because it can be changed into another prime (74836754021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37418377260 + 37418377261.

It is an arithmetic number, because the mean of its divisors is an integer number (37418377261).

Almost surely, 2^74836754521 is an apocalyptic number.

It is an amenable number.

74836754521 is a deficient number, since it is larger than the sum of its proper divisors (1).

74836754521 is an equidigital number, since it uses as much as digits as its factorization.

74836754521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5644800, while the sum is 52.

The spelling of 74836754521 in words is "seventy-four billion, eight hundred thirty-six million, seven hundred fifty-four thousand, five hundred twenty-one".