30155120400 has 120 divisors (see below), whose sum is σ = 101681026720. Its totient is φ = 7618129920.

The previous prime is 30155120383. The next prime is 30155120503. The reversal of 30155120400 is 402155103.

It is a tau number, because it is divible by the number of its divisors (120).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 638497 + ... + 684096.

Almost surely, 2^30155120400 is an apocalyptic number.

30155120400 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

30155120400 is an abundant number, since it is smaller than the sum of its proper divisors (71525906320).

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

30155120400 is a wasteful number, since it uses less digits than its factorization.

30155120400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1322633 (or 1322622 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 21.

Adding to 30155120400 its reverse (402155103), we get a palindrome (30557275503).

The spelling of 30155120400 in words is "thirty billion, one hundred fifty-five million, one hundred twenty thousand, four hundred".