2565005402 has 8 divisors (see below), whose sum is σ = 4014791136. Its totient is φ = 1226741692.

The previous prime is 2565005389. The next prime is 2565005423. The reversal of 2565005402 is 2045005652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27880448 + ... + 27880539.

It is an arithmetic number, because the mean of its divisors is an integer number (501848892).

Almost surely, 2^2565005402 is an apocalyptic number.

2565005402 is a deficient number, since it is larger than the sum of its proper divisors (1449785734).

2565005402 is a wasteful number, since it uses less digits than its factorization.

2565005402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55761012.

The product of its (nonzero) digits is 12000, while the sum is 29.

The square root of 2565005402 is about 50645.8823795183. The cubic root of 2565005402 is about 1368.8717515823.

The spelling of 2565005402 in words is "two billion, five hundred sixty-five million, five thousand, four hundred two".