4002561550 has 48 divisors (see below), whose sum is σ = 8023986432. Its totient is φ = 1476662400.

The previous prime is 4002561547. The next prime is 4002561557. The reversal of 4002561550 is 551652004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4002561557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1370692 + ... + 1373608.

It is an arithmetic number, because the mean of its divisors is an integer number (167166384).

Almost surely, 2^4002561550 is an apocalyptic number.

4002561550 is an abundant number, since it is smaller than the sum of its proper divisors (4021424882).

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

4002561550 is a wasteful number, since it uses less digits than its factorization.

4002561550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5053 (or 5048 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 4002561550 is about 63265.8007931615. The cubic root of 4002561550 is about 1587.7398302591.

The spelling of 4002561550 in words is "four billion, two million, five hundred sixty-one thousand, five hundred fifty".