74821682617 has 4 divisors (see below), whose sum is σ = 81623653776. Its totient is φ = 68019711460.

The previous prime is 74821682597. The next prime is 74821682647. The reversal of 74821682617 is 71628612847.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 74821682617 - 2²³ = 74813294009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74821682647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3400985563 + ... + 3400985584.

It is an arithmetic number, because the mean of its divisors is an integer number (20405913444).

Almost surely, 2^74821682617 is an apocalyptic number.

It is an amenable number.

74821682617 is a deficient number, since it is larger than the sum of its proper divisors (6801971159).

74821682617 is a wasteful number, since it uses less digits than its factorization.

74821682617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6801971158.

The product of its digits is 1806336, while the sum is 52.

The spelling of 74821682617 in words is "seventy-four billion, eight hundred twenty-one million, six hundred eighty-two thousand, six hundred seventeen".