74061856777 has 4 divisors (see below), whose sum is σ = 74281625236. Its totient is φ = 73842088320.

The previous prime is 74061856763. The next prime is 74061856783. The reversal of 74061856777 is 77765816047.

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

It can be written as a sum of positive squares in 2 ways, for example, as 52119063616 + 21942793161 = 228296^2 + 148131^2 .

It is a cyclic number.

It is not a de Polignac number, because 74061856777 - 2³⁵ = 39702118409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74061856727) 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, 109883724 + ... + 109884397.

It is an arithmetic number, because the mean of its divisors is an integer number (18570406309).

Almost surely, 2^74061856777 is an apocalyptic number.

It is an amenable number.

74061856777 is a deficient number, since it is larger than the sum of its proper divisors (219768459).

74061856777 is a wasteful number, since it uses less digits than its factorization.

74061856777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219768458.

The product of its (nonzero) digits is 13829760, while the sum is 58.

The spelling of 74061856777 in words is "seventy-four billion, sixty-one million, eight hundred fifty-six thousand, seven hundred seventy-seven".