2649473749 has 8 divisors (see below), whose sum is σ = 3021119640. Its totient is φ = 2301805056.

The previous prime is 2649473693. The next prime is 2649473773. The reversal of 2649473749 is 9473749462.

It can be written as a sum of positive squares in 4 ways, for example, as 108305649 + 2541168100 = 10407^2 + 50410^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2649473749 - 2¹³ = 2649465557 is a prime.

It is a super-2 number, since 2×2649473749² = 14039422293280230002, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2649473749.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2649473789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5994064 + ... + 5994505.

It is an arithmetic number, because the mean of its divisors is an integer number (377639955).

Almost surely, 2^2649473749 is an apocalyptic number.

It is an amenable number.

2649473749 is a deficient number, since it is larger than the sum of its proper divisors (371645891).

2649473749 is a wasteful number, since it uses less digits than its factorization.

2649473749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11988599.

The product of its digits is 9144576, while the sum is 55.

The square root of 2649473749 is about 51473.0390495840. The cubic root of 2649473749 is about 1383.7358949880.

The spelling of 2649473749 in words is "two billion, six hundred forty-nine million, four hundred seventy-three thousand, seven hundred forty-nine".