30672211781 has 8 divisors (see below), whose sum is σ = 31253543064. Its totient is φ = 30090977280.

The previous prime is 30672211771. The next prime is 30672211811. The reversal of 30672211781 is 18711227603.

It can be written as a sum of positive squares in 4 ways, for example, as 3885652225 + 26786559556 = 62335^2 + 163666^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 30672211781 - 2¹⁰ = 30672210757 is a prime.

It is a super-2 number, since 2×30672211781² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30672211721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1144325 + ... + 1170821.

It is an arithmetic number, because the mean of its divisors is an integer number (3906692883).

Almost surely, 2^30672211781 is an apocalyptic number.

It is an amenable number.

30672211781 is a deficient number, since it is larger than the sum of its proper divisors (581331283).

30672211781 is a wasteful number, since it uses less digits than its factorization.

30672211781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48391.

The product of its (nonzero) digits is 28224, while the sum is 38.

The spelling of 30672211781 in words is "thirty billion, six hundred seventy-two million, two hundred eleven thousand, seven hundred eighty-one".