2640629115 has 48 divisors (see below), whose sum is σ = 4646977920. Its totient is φ = 1386927360.

The previous prime is 2640629111. The next prime is 2640629129. The reversal of 2640629115 is 5119260462.

2640629115 is a `hidden beast` number, since 2 + 640 + 6 + 2 + 9 + 1 + 1 + 5 = 666.

It is not a de Polignac number, because 2640629115 - 2² = 2640629111 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2640629115.

It is not an unprimeable number, because it can be changed into a prime (2640629111) 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 47 ways as a sum of consecutive naturals, for example, 1922569 + ... + 1923941.

It is an arithmetic number, because the mean of its divisors is an integer number (96812040).

Almost surely, 2^2640629115 is an apocalyptic number.

2640629115 is a deficient number, since it is larger than the sum of its proper divisors (2006348805).

2640629115 is a wasteful number, since it uses less digits than its factorization.

2640629115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2004 (or 2001 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 2640629115 is about 51387.0520170208. The cubic root of 2640629115 is about 1382.1944213967.

Adding to 2640629115 its reverse (5119260462), we get a palindrome (7759889577).

The spelling of 2640629115 in words is "two billion, six hundred forty million, six hundred twenty-nine thousand, one hundred fifteen".