2563997850 has 72 divisors (see below), whose sum is σ = 6908550012. Its totient is φ = 681753600.

The previous prime is 2563997837. The next prime is 2563997867. The reversal of 2563997850 is 587993652.

2563997850 is a `hidden beast` number, since 2 + 563 + 9 + 9 + 78 + 5 + 0 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 700607961 + 1863389889 = 26469^2 + 43167^2 .

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 35 ways as a sum of consecutive naturals, for example, 150780 + ... + 166920.

Almost surely, 2^2563997850 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2563997850, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3454275006).

2563997850 is an abundant number, since it is smaller than the sum of its proper divisors (4344552162).

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

2563997850 is a wasteful number, since it uses less digits than its factorization.

2563997850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16512 (or 16504 counting only the distinct ones).

The product of its (nonzero) digits is 4082400, while the sum is 54.

The square root of 2563997850 is about 50635.9343747106. The cubic root of 2563997850 is about 1368.6924939873.

The spelling of 2563997850 in words is "two billion, five hundred sixty-three million, nine hundred ninety-seven thousand, eight hundred fifty".