2506621000 has 64 divisors (see below), whose sum is σ = 6316717680. Its totient is φ = 925516800.

The previous prime is 2506620943. The next prime is 2506621021. The reversal of 2506621000 is 1266052.

It can be written as a sum of positive squares in 8 ways, for example, as 84603204 + 2422017796 = 9198^2 + 49214^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 83409 + ... + 109408.

Almost surely, 2^2506621000 is an apocalyptic number.

2506621000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2506621000 is an abundant number, since it is smaller than the sum of its proper divisors (3810096680).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2506621000 is a wasteful number, since it uses less digits than its factorization.

2506621000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192851 (or 192837 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 2506621000 is about 50066.1662203129. The cubic root of 2506621000 is about 1358.4058960655.

Adding to 2506621000 its reverse (1266052), we get a palindrome (2507887052).

The spelling of 2506621000 in words is "two billion, five hundred six million, six hundred twenty-one thousand".