2505640654 has 24 divisors (see below), whose sum is σ = 4310827920. Its totient is φ = 1089406560.

The previous prime is 2505640651. The next prime is 2505640663. The reversal of 2505640654 is 4560465052.

It is a super-3 number, since 3×2505640654³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2505640651) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 219519 + ... + 230650.

It is an arithmetic number, because the mean of its divisors is an integer number (179617830).

Almost surely, 2^2505640654 is an apocalyptic number.

2505640654 is a deficient number, since it is larger than the sum of its proper divisors (1805187266).

2505640654 is a wasteful number, since it uses less digits than its factorization.

2505640654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 450216 (or 450205 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 37.

The square root of 2505640654 is about 50056.3747588656. The cubic root of 2505640654 is about 1358.2287809457.

The spelling of 2505640654 in words is "two billion, five hundred five million, six hundred forty thousand, six hundred fifty-four".