74474647447 has 8 divisors (see below), whose sum is σ = 76118197680. Its totient is φ = 72848865600.

The previous prime is 74474647441. The next prime is 74474647483.

74474647447 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74474647447 is a prime.

It is a super-2 number, since 2×74474647447² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 74474647391 and 74474647400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74474647441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4433622 + ... + 4450387.

It is an arithmetic number, because the mean of its divisors is an integer number (9514774710).

Almost surely, 2^74474647447 is an apocalyptic number.

74474647447 is a deficient number, since it is larger than the sum of its proper divisors (1643550233).

74474647447 is a wasteful number, since it uses less digits than its factorization.

74474647447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8884193.

The product of its digits is 59006976, while the sum is 58.

The spelling of 74474647447 in words is "seventy-four billion, four hundred seventy-four million, six hundred forty-seven thousand, four hundred forty-seven".