2649669461 has 8 divisors (see below), whose sum is σ = 2680696920. Its totient is φ = 2618811648.

The previous prime is 2649669443. The next prime is 2649669467. The reversal of 2649669461 is 1649669462.

It can be written as a sum of positive squares in 4 ways, for example, as 1286656900 + 1363012561 = 35870^2 + 36919^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2649669461 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 (2649669467) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10856 + ... + 73601.

It is an arithmetic number, because the mean of its divisors is an integer number (335087115).

Almost surely, 2^2649669461 is an apocalyptic number.

It is an amenable number.

2649669461 is a deficient number, since it is larger than the sum of its proper divisors (31027459).

2649669461 is a wasteful number, since it uses less digits than its factorization.

2649669461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84823.

The product of its digits is 3359232, while the sum is 53.

The square root of 2649669461 is about 51474.9401262401. The cubic root of 2649669461 is about 1383.7699655340.

Subtracting from 2649669461 its reverse (1649669462), we obtain a palindrome (999999999).

The spelling of 2649669461 in words is "two billion, six hundred forty-nine million, six hundred sixty-nine thousand, four hundred sixty-one".