2489102580721 has 3 divisors (see below), whose sum is σ = 2489104158411. Its totient is φ = 2489101003032.

The previous prime is 2489102580691. The next prime is 2489102580733. The reversal of 2489102580721 is 1270852019842.

It is a happy number.

The square root of 2489102580721 is 1577689.

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 can be written as a sum of positive squares in only one way, i.e., 253120678321 + 2235981902400 = 503111^2 + 1495320^2 .

It is not a de Polignac number, because 2489102580721 - 2¹³ = 2489102572529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2489102580781) 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, 788845 + ... + 2366533.

It is an arithmetic number, because the mean of its divisors is an integer number (829701386137).

Almost surely, 2^{2489102580721} is an apocalyptic number.

2489102580721 is the 1577689-th square number.

2489102580721 is the 788845-th centered octagonal number.

It is an amenable number.

2489102580721 is a deficient number, since it is larger than the sum of its proper divisors (1577690).

2489102580721 is an frugal number, since it uses more digits than its factorization.

2489102580721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3155378 (or 1577689 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 49.

Multiplying 2489102580721 by its sum of digits (49), we get a square (121966026455329 = 11043823²).

The spelling of 2489102580721 in words is "two trillion, four hundred eighty-nine billion, one hundred two million, five hundred eighty thousand, seven hundred twenty-one".