2445504843721 has 3 divisors (see below), whose sum is σ = 2445506407533. Its totient is φ = 2445503279910.

The previous prime is 2445504843659. The next prime is 2445504843739. The reversal of 2445504843721 is 1273484055442.

The square root of 2445504843721 is 1563811.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 2445504843721 - 2⁹ = 2445504843209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2445504813721) 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, 781906 + ... + 2345716.

It is an arithmetic number, because the mean of its divisors is an integer number (815168802511).

Almost surely, 2^{2445504843721} is an apocalyptic number.

2445504843721 is the 1563811-st square number.

2445504843721 is the 781906-th centered octagonal number.

It is an amenable number.

2445504843721 is a deficient number, since it is larger than the sum of its proper divisors (1563812).

2445504843721 is an frugal number, since it uses more digits than its factorization.

2445504843721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3127622 (or 1563811 counting only the distinct ones).

The product of its (nonzero) digits is 4300800, while the sum is 49.

Multiplying 2445504843721 by its sum of digits (49), we get a square (119829737342329 = 10946677²).

The spelling of 2445504843721 in words is "two trillion, four hundred forty-five billion, five hundred four million, eight hundred forty-three thousand, seven hundred twenty-one".