2621446749 has 6 divisors (see below), whose sum is σ = 3786534206. Its totient is φ = 1747631160.

The previous prime is 2621446721. The next prime is 2621446787. The reversal of 2621446749 is 9476441262.

It can be written as a sum of positive squares in only one way, i.e., 1956735225 + 664711524 = 44235^2 + 25782^2 .

It is not a de Polignac number, because 2621446749 - 2¹¹ = 2621444701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2621446249) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 145635922 + ... + 145635939.

Almost surely, 2^2621446749 is an apocalyptic number.

It is an amenable number.

2621446749 is a deficient number, since it is larger than the sum of its proper divisors (1165087457).

2621446749 is a wasteful number, since it uses less digits than its factorization.

2621446749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291271867 (or 291271864 counting only the distinct ones).

The product of its digits is 580608, while the sum is 45.

The square root of 2621446749 is about 51200.0659081607. The cubic root of 2621446749 is about 1378.8393849104.

The spelling of 2621446749 in words is "two billion, six hundred twenty-one million, four hundred forty-six thousand, seven hundred forty-nine".