2291729172480 has 768 divisors, whose sum is σ = 8915961600000. Its totient is φ = 553759211520.

The previous prime is 2291729172451. The next prime is 2291729172493. The reversal of 2291729172480 is 842719271922.

2291729172480 is a `hidden beast` number, since 2 + 2 + 9 + 1 + 7 + 2 + 91 + 72 + 480 = 666.

It is a tau number, because it is divible by the number of its divisors (768).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1091818471 + ... + 1091820569.

It is an arithmetic number, because the mean of its divisors is an integer number (11609325000).

Almost surely, 2^{2291729172480} is an apocalyptic number.

2291729172480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2291729172480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4457980800000).

2291729172480 is an abundant number, since it is smaller than the sum of its proper divisors (6624232427520).

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

2291729172480 is a wasteful number, since it uses less digits than its factorization.

2291729172480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2505 (or 2479 counting only the distinct ones).

The product of its (nonzero) digits is 2032128, while the sum is 54.

The spelling of 2291729172480 in words is "two trillion, two hundred ninety-one billion, seven hundred twenty-nine million, one hundred seventy-two thousand, four hundred eighty".