2505401906 has 16 divisors (see below), whose sum is σ = 4301796480. Its totient is φ = 1072038240.

The previous prime is 2505401903. The next prime is 2505401917. The reversal of 2505401906 is 6091045052.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (2505401903) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 132971 + ... + 150638.

It is an arithmetic number, because the mean of its divisors is an integer number (268862280).

Almost surely, 2^2505401906 is an apocalyptic number.

2505401906 is a deficient number, since it is larger than the sum of its proper divisors (1796394574).

2505401906 is a wasteful number, since it uses less digits than its factorization.

2505401906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284249.

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 2505401906 is about 50053.9899108952. The cubic root of 2505401906 is about 1358.1856403216.

Adding to 2505401906 its reverse (6091045052), we get a palindrome (8596446958).

The spelling of 2505401906 in words is "two billion, five hundred five million, four hundred one thousand, nine hundred six".