30471457661 has 8 divisors (see below), whose sum is σ = 30553131864. Its totient is φ = 30389878080.

The previous prime is 30471457591. The next prime is 30471457669. The reversal of 30471457661 is 16675417403.

It can be written as a sum of positive squares in 4 ways, for example, as 6328202500 + 24143255161 = 79550^2 + 155381^2 .

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-30471457661 is a prime.

It is a super-2 number, since 2×30471457661² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30471457669) 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, 646451 + ... + 691983.

It is an arithmetic number, because the mean of its divisors is an integer number (3819141483).

Almost surely, 2^30471457661 is an apocalyptic number.

It is an amenable number.

30471457661 is a deficient number, since it is larger than the sum of its proper divisors (81674203).

30471457661 is a wasteful number, since it uses less digits than its factorization.

30471457661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47311.

The product of its (nonzero) digits is 423360, while the sum is 44.

The spelling of 30471457661 in words is "thirty billion, four hundred seventy-one million, four hundred fifty-seven thousand, six hundred sixty-one".