30355725561 has 32 divisors (see below), whose sum is σ = 47152373760. Its totient is φ = 17012778624.

The previous prime is 30355725551. The next prime is 30355725593. The reversal of 30355725561 is 16552755303.

It is a happy number.

It is not a de Polignac number, because 30355725561 - 2⁵ = 30355725529 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (30355725511) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 219096 + ... + 329718.

It is an arithmetic number, because the mean of its divisors is an integer number (1473511680).

Almost surely, 2^30355725561 is an apocalyptic number.

It is an amenable number.

30355725561 is a deficient number, since it is larger than the sum of its proper divisors (16796648199).

30355725561 is a wasteful number, since it uses less digits than its factorization.

30355725561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110885.

The product of its (nonzero) digits is 472500, while the sum is 42.

The spelling of 30355725561 in words is "thirty billion, three hundred fifty-five million, seven hundred twenty-five thousand, five hundred sixty-one".