191225461780 has 24 divisors (see below), whose sum is σ = 401584687560. Its totient is φ = 76488048000.

The previous prime is 191225461747. The next prime is 191225461781. The reversal of 191225461780 is 87164522191.

191225461780 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 960256144 + 190265205636 = 30988^2 + 436194^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 191225461780.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191225461781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 739530 + ... + 964030.

It is an arithmetic number, because the mean of its divisors is an integer number (16732695315).

Almost surely, 2^191225461780 is an apocalyptic number.

191225461780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

191225461780 is an abundant number, since it is smaller than the sum of its proper divisors (210359225780).

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

191225461780 is a wasteful number, since it uses less digits than its factorization.

191225461780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267099 (or 267097 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 46.

The spelling of 191225461780 in words is "one hundred ninety-one billion, two hundred twenty-five million, four hundred sixty-one thousand, seven hundred eighty".