1640515025 has 12 divisors (see below), whose sum is σ = 2077521792. Its totient is φ = 1284487440.

The previous prime is 1640515013. The next prime is 1640515067. The reversal of 1640515025 is 5205150461.

It is a happy number.

It is not a de Polignac number, because 1640515025 - 2¹² = 1640510929 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 696917 + ... + 699266.

It is an arithmetic number, because the mean of its divisors is an integer number (173126816).

Almost surely, 2^1640515025 is an apocalyptic number.

It is an amenable number.

1640515025 is a deficient number, since it is larger than the sum of its proper divisors (437006767).

1640515025 is a wasteful number, since it uses less digits than its factorization.

1640515025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1396240 (or 1396235 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 29.

The square root of 1640515025 is about 40503.2717814253. The cubic root of 1640515025 is about 1179.3971413019.

Adding to 1640515025 its reverse (5205150461), we get a palindrome (6845665486).

The spelling of 1640515025 in words is "one billion, six hundred forty million, five hundred fifteen thousand, twenty-five".