74655641 has 4 divisors (see below), whose sum is σ = 76064292. Its totient is φ = 73246992.

The previous prime is 74655613. The next prime is 74655667. The reversal of 74655641 is 14655647.

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 51423241 + 23232400 = 7171^2 + 4820^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74655641 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 74655595 and 74655604.

It is not an unprimeable number, because it can be changed into a prime (74655601) 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, 704246 + ... + 704351.

It is an arithmetic number, because the mean of its divisors is an integer number (19016073).

Almost surely, 2^74655641 is an apocalyptic number.

It is an amenable number.

74655641 is a deficient number, since it is larger than the sum of its proper divisors (1408651).

74655641 is a wasteful number, since it uses less digits than its factorization.

74655641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1408650.

The product of its digits is 100800, while the sum is 38.

The square root of 74655641 is about 8640.3495878350. The cubic root of 74655641 is about 421.0699120153.

The spelling of 74655641 in words is "seventy-four million, six hundred fifty-five thousand, six hundred forty-one".