74742401779 has 4 divisors (see below), whose sum is σ = 74743287640. Its totient is φ = 74741515920.

The previous prime is 74742401753. The next prime is 74742401801. The reversal of 74742401779 is 97710424747.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97710424747 = 13 ⋅7516186519.

It is a cyclic number.

It is not a de Polignac number, because 74742401779 - 2¹¹ = 74742399731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74742491779) 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, 301269 + ... + 490150.

It is an arithmetic number, because the mean of its divisors is an integer number (18685821910).

Almost surely, 2^74742401779 is an apocalyptic number.

74742401779 is a deficient number, since it is larger than the sum of its proper divisors (885861).

74742401779 is an equidigital number, since it uses as much as digits as its factorization.

74742401779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 885860.

The product of its (nonzero) digits is 2765952, while the sum is 52.

The spelling of 74742401779 in words is "seventy-four billion, seven hundred forty-two million, four hundred one thousand, seven hundred seventy-nine".