6465621772025 has 24 divisors (see below), whose sum is σ = 8636704132224. Its totient is φ = 4773168417600.

The previous prime is 6465621771977. The next prime is 6465621772073. The reversal of 6465621772025 is 5202771265646.

It is an interprime number because it is at equal distance from previous prime (6465621771977) and next prime (6465621772073).

It is not a de Polignac number, because 6465621772025 - 2¹⁰ = 6465621771001 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 (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1933121 + ... + 4082670.

It is an arithmetic number, because the mean of its divisors is an integer number (359862672176).

Almost surely, 2^{6465621772025} is an apocalyptic number.

6465621772025 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

6465621772025 is a deficient number, since it is larger than the sum of its proper divisors (2171082360199).

6465621772025 is a wasteful number, since it uses less digits than its factorization.

6465621772025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6019121 (or 6019116 counting only the distinct ones).

The product of its (nonzero) digits is 8467200, while the sum is 53.

The spelling of 6465621772025 in words is "six trillion, four hundred sixty-five billion, six hundred twenty-one million, seven hundred seventy-two thousand, twenty-five".