30402155556 has 36 divisors (see below), whose sum is σ = 76874074732. Its totient is φ = 10130863104.

The previous prime is 30402155521. The next prime is 30402155557. The reversal of 30402155556 is 65555120403.

30402155556 is a `hidden beast` number, since 30 + 4 + 0 + 21 + 55 + 556 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 24834608100 + 5567547456 = 157590^2 + 74616^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 30402155556.

It is not an unprimeable number, because it can be changed into a prime (30402155557) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15445 + ... + 247068.

Almost surely, 2^30402155556 is an apocalyptic number.

30402155556 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

30402155556 is an abundant number, since it is smaller than the sum of its proper divisors (46471919176).

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

30402155556 is a wasteful number, since it uses less digits than its factorization.

30402155556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265740 (or 265735 counting only the distinct ones).

The product of its (nonzero) digits is 90000, while the sum is 36.

Adding to 30402155556 its reverse (65555120403), we get a palindrome (95957275959).

The spelling of 30402155556 in words is "thirty billion, four hundred two million, one hundred fifty-five thousand, five hundred fifty-six".