30120746857 has 8 divisors (see below), whose sum is σ = 30222996872. Its totient is φ = 30018643200.

The previous prime is 30120746809. The next prime is 30120746861. The reversal of 30120746857 is 75864702103.

It can be written as a sum of positive squares in 4 ways, for example, as 845879056 + 29274867801 = 29084^2 + 171099^2 .

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 30120746857 - 2¹⁹ = 30120222569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30120746657) 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, 383857 + ... + 455617.

It is an arithmetic number, because the mean of its divisors is an integer number (3777874609).

Almost surely, 2^30120746857 is an apocalyptic number.

It is an amenable number.

30120746857 is a deficient number, since it is larger than the sum of its proper divisors (102250015).

30120746857 is an equidigital number, since it uses as much as digits as its factorization.

30120746857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73179.

The product of its (nonzero) digits is 282240, while the sum is 43.

The spelling of 30120746857 in words is "thirty billion, one hundred twenty million, seven hundred forty-six thousand, eight hundred fifty-seven".