2506721850 has 96 divisors (see below), whose sum is σ = 6917950080. Its totient is φ = 667440000.

The previous prime is 2506721839. The next prime is 2506721863. The reversal of 2506721850 is 581276052.

It is a happy number.

2506721850 is a `hidden beast` number, since 2 + 506 + 72 + 1 + 85 + 0 = 666.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1390950 + ... + 1392750.

It is an arithmetic number, because the mean of its divisors is an integer number (72061980).

Almost surely, 2^2506721850 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2506721850, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3458975040).

2506721850 is an abundant number, since it is smaller than the sum of its proper divisors (4411228230).

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

2506721850 is a wasteful number, since it uses less digits than its factorization.

2506721850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2853 (or 2842 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 36.

The square root of 2506721850 is about 50067.1733773737. The cubic root of 2506721850 is about 1358.4241136045.

The spelling of 2506721850 in words is "two billion, five hundred six million, seven hundred twenty-one thousand, eight hundred fifty".