74861305643 has 4 divisors (see below), whose sum is σ = 74869089840. Its totient is φ = 74853521448.

The previous prime is 74861305633. The next prime is 74861305663. The reversal of 74861305643 is 34650316847.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 74861305643 - 2⁴ = 74861305627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74861305633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3877655 + ... + 3896912.

It is an arithmetic number, because the mean of its divisors is an integer number (18717272460).

Almost surely, 2^74861305643 is an apocalyptic number.

74861305643 is a deficient number, since it is larger than the sum of its proper divisors (7784197).

74861305643 is an equidigital number, since it uses as much as digits as its factorization.

74861305643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7784196.

The product of its (nonzero) digits is 1451520, while the sum is 47.

The spelling of 74861305643 in words is "seventy-four billion, eight hundred sixty-one million, three hundred five thousand, six hundred forty-three".