2491223364 has 252 divisors, whose sum is σ = 7779781632. Its totient is φ = 683393760.

The previous prime is 2491223353. The next prime is 2491223369. The reversal of 2491223364 is 4633221942.

It is a tau number, because it is divible by the number of its divisors (252).

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

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2491223369) by changing a digit.

It is a polite number, since it can be written in 83 ways as a sum of consecutive naturals, for example, 19615869 + ... + 19615995.

Almost surely, 2^2491223364 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2491223364, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3889890816).

2491223364 is an abundant number, since it is smaller than the sum of its proper divisors (5288558268).

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

2491223364 is a wasteful number, since it uses less digits than its factorization.

2491223364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218 (or 170 counting only the distinct ones).

The product of its digits is 62208, while the sum is 36.

The square root of 2491223364 is about 49912.1564751514. The cubic root of 2491223364 is about 1355.6187157299.

The spelling of 2491223364 in words is "two billion, four hundred ninety-one million, two hundred twenty-three thousand, three hundred sixty-four".