2640026525 has 12 divisors (see below), whose sum is σ = 3285810900. Its totient is φ = 2104164480.

The previous prime is 2640026489. The next prime is 2640026533. The reversal of 2640026525 is 5256200462.

It can be written as a sum of positive squares in 6 ways, for example, as 400560196 + 2239466329 = 20014^2 + 47323^2 .

It is not a de Polignac number, because 2640026525 - 2⁶ = 2640026461 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2640026491 and 2640026500.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 189560 + ... + 203009.

It is an arithmetic number, because the mean of its divisors is an integer number (273817575).

Almost surely, 2^2640026525 is an apocalyptic number.

2640026525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2640026525 is a deficient number, since it is larger than the sum of its proper divisors (645784375).

2640026525 is a wasteful number, since it uses less digits than its factorization.

2640026525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392848 (or 392843 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 32.

The square root of 2640026525 is about 51381.1884350683. The cubic root of 2640026525 is about 1382.0892747488.

Adding to 2640026525 its reverse (5256200462), we get a palindrome (7896226987).

It can be divided in two parts, 26400 and 26525, that added together give a palindrome (52925).

The spelling of 2640026525 in words is "two billion, six hundred forty million, twenty-six thousand, five hundred twenty-five".