30819909136 has 15 divisors (see below), whose sum is σ = 59714934541. Its totient is φ = 15409603456.

The previous prime is 30819909097. The next prime is 30819909137. The reversal of 30819909136 is 63190991803.

The square root of 30819909136 is 175556.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 29089349136 + 1730560000 = 170556^2 + 41600^2 .

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 30819909136.

It is not an unprimeable number, because it can be changed into a prime (30819909137) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 680280 + ... + 724168.

Almost surely, 2^30819909136 is an apocalyptic number.

30819909136 is the 175556-th square number.

It is an amenable number.

30819909136 is a deficient number, since it is larger than the sum of its proper divisors (28895025405).

30819909136 is an frugal number, since it uses more digits than its factorization.

30819909136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87786 (or 43891 counting only the distinct ones).

The product of its (nonzero) digits is 314928, while the sum is 49.

Multiplying 30819909136 by its sum of digits (49), we get a square (1510175547664 = 1228892²).

It can be divided in two parts, 308 and 19909136, that added together give a square (19909444 = 4462²).

The spelling of 30819909136 in words is "thirty billion, eight hundred nineteen million, nine hundred nine thousand, one hundred thirty-six".