30661555630 has 32 divisors (see below), whose sum is σ = 55980592704. Its totient is φ = 12089316096.

The previous prime is 30661555571. The next prime is 30661555649. The reversal of 30661555630 is 3655516603.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1289812 + ... + 1313368.

It is an arithmetic number, because the mean of its divisors is an integer number (1749393522).

Almost surely, 2^30661555630 is an apocalyptic number.

30661555630 is a deficient number, since it is larger than the sum of its proper divisors (25319037074).

30661555630 is a wasteful number, since it uses less digits than its factorization.

30661555630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25420.

The product of its (nonzero) digits is 243000, while the sum is 40.

The spelling of 30661555630 in words is "thirty billion, six hundred sixty-one million, five hundred fifty-five thousand, six hundred thirty".