30055120621656 has 48 divisors (see below), whose sum is σ = 81362234829960. Its totient is φ = 9247729420800.

The previous prime is 30055120621627. The next prime is 30055120621699. The reversal of 30055120621656 is 65612602155003.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3705015745 + ... + 3705023856.

Almost surely, 2^{30055120621656} is an apocalyptic number.

It is an amenable number.

30055120621656 is an abundant number, since it is smaller than the sum of its proper divisors (51307114208304).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30055120621656 is a wasteful number, since it uses less digits than its factorization.

30055120621656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7410039636 (or 7410039619 counting only the distinct ones).

The product of its (nonzero) digits is 324000, while the sum is 42.

Adding to 30055120621656 its reverse (65612602155003), we get a palindrome (95667722776659).

The spelling of 30055120621656 in words is "thirty trillion, fifty-five billion, one hundred twenty million, six hundred twenty-one thousand, six hundred fifty-six".