91204000000 has 189 divisors, whose sum is σ = 229078766973. Its totient is φ = 36240000000.

The previous prime is 91203999983. The next prime is 91204000049. The reversal of 91204000000 is 40219.

The square root of 91204000000 is 302000.

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

It can be written as a sum of positive squares in 3 ways, for example, as 79903459584 + 11300540416 = 282672^2 + 106304^2 .

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 20 ways as a sum of consecutive naturals, for example, 603999925 + ... + 604000075.

Almost surely, 2^91204000000 is an apocalyptic number.

91204000000 is the 302000-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91204000000

91204000000 is an abundant number, since it is smaller than the sum of its proper divisors (137874766973).

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

91204000000 is an frugal number, since it uses more digits than its factorization.

91204000000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348 (or 158 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Multiplying 91204000000 by its sum of digits (16), we get a square (1459264000000 = 1208000²).

91204000000 divided by its sum of digits (16) gives a square (5700250000 = 75500²).

Adding to 91204000000 its reverse (40219), we get a palindrome (91204040219).

The spelling of 91204000000 in words is "ninety-one billion, two hundred four million", and thus it is an aban number.