2649719465 has 8 divisors (see below), whose sum is σ = 3180109128. Its totient is φ = 2119478400.

The previous prime is 2649719447. The next prime is 2649719483. The reversal of 2649719465 is 5649179462.

It is an interprime number because it is at equal distance from previous prime (2649719447) and next prime (2649719483).

It can be written as a sum of positive squares in 4 ways, for example, as 54937744 + 2594781721 = 7412^2 + 50939^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-2649719465 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6815 + ... + 73115.

It is an arithmetic number, because the mean of its divisors is an integer number (397513641).

Almost surely, 2^2649719465 is an apocalyptic number.

It is an amenable number.

2649719465 is a deficient number, since it is larger than the sum of its proper divisors (530389663).

2649719465 is an equidigital number, since it uses as much as digits as its factorization.

2649719465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74299.

The product of its digits is 3265920, while the sum is 53.

The square root of 2649719465 is about 51475.4258360239. The cubic root of 2649719465 is about 1383.7786702170.

The spelling of 2649719465 in words is "two billion, six hundred forty-nine million, seven hundred nineteen thousand, four hundred sixty-five".